/*
  Copyright (c) 2008-2012 Red Hat, Inc. <http://www.redhat.com>
  This file is part of GlusterFS.

  This file is licensed to you under your choice of the GNU Lesser
  General Public License, version 3 or any later version (LGPLv3 or
  later), or the GNU General Public License, version 2 (GPLv2), in all
  cases as published by the Free Software Foundation.
*/

#include "client.h"
#include "rpc-common-xdr.h"
#include "glusterfs4-xdr.h"
#include "glusterfs3.h"
#include "compat-errno.h"
#include "client-messages.h"
#include "defaults.h"
#include "client-common.h"
#include "compound-fop-utils.h"

extern int32_t
client3_getspec (call_frame_t *frame, xlator_t *this, void *data);
extern int32_t
client3_3_getxattr (call_frame_t *frame, xlator_t *this, void *data);

int
client4_0_symlink_cbk (struct rpc_req *req, struct iovec *iov, int count,
                       void *myframe)
{
        gfx_common_3iatt_rsp rsp        = {0,};
        call_frame_t     *frame      = NULL;
        struct iatt       stbuf      = {0,};
        struct iatt       preparent  = {0,};
        struct iatt       postparent = {0,};
        int               ret        = 0;
        clnt_local_t     *local      = NULL;
        inode_t          *inode      = NULL;
        xlator_t         *this       = NULL;
        dict_t           *xdata      = NULL;

        this = THIS;

        frame = myframe;

        local = frame->local;
        inode = local->loc.inode;

        if (-1 == req->rpc_status) {
                rsp.op_ret   = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }
        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_common_3iatt_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }

        ret = client_post_common_3iatt (this, &rsp, &stbuf, &preparent,
                                        &postparent, &xdata);

out:
        if (rsp.op_ret == -1) {
                if (GF_IGNORE_IF_GSYNCD_SAFE_ERROR(frame, rsp.op_errno)) {
                        /* no need to print the gfid, because it will be null,
                         * since symlink operation failed.
                         */
                        gf_msg (this->name, GF_LOG_WARNING,
                                gf_error_to_errno (rsp.op_errno),
                                PC_MSG_REMOTE_OP_FAILED,
                                "remote operation failed. Path: (%s to %s)",
                                local->loc.path, local->loc2.path);
                }
        }

        CLIENT_STACK_UNWIND (symlink, frame, rsp.op_ret,
                             gf_error_to_errno (rsp.op_errno), inode, &stbuf,
                             &preparent, &postparent, xdata);

        if (xdata)
                dict_unref (xdata);

        return 0;
}


int
client4_0_mknod_cbk (struct rpc_req *req, struct iovec *iov, int count,
                     void *myframe)
{
        gfx_common_3iatt_rsp  rsp        = {0,};
        call_frame_t     *frame      = NULL;
        struct iatt       stbuf      = {0,};
        struct iatt       preparent  = {0,};
        struct iatt       postparent = {0,};
        int               ret        = 0;
        clnt_local_t     *local      = NULL;
        inode_t          *inode      = NULL;
        xlator_t         *this       = NULL;
        dict_t           *xdata      = NULL;

        this = THIS;

        frame = myframe;

        local = frame->local;

        inode = local->loc.inode;

        if (-1 == req->rpc_status) {
                rsp.op_ret   = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }
        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_common_3iatt_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }

        ret = client_post_common_3iatt (this, &rsp, &stbuf, &preparent, &postparent,
                                        &xdata);

out:
        if (rsp.op_ret == -1 &&
            GF_IGNORE_IF_GSYNCD_SAFE_ERROR(frame, rsp.op_errno)) {
                gf_msg (this->name, fop_log_level (GF_FOP_MKNOD,
                        gf_error_to_errno (rsp.op_errno)),
                        gf_error_to_errno (rsp.op_errno),
                        PC_MSG_REMOTE_OP_FAILED,
                        "remote operation failed. Path: %s",
                        local->loc.path);
        }

        CLIENT_STACK_UNWIND (mknod, frame, rsp.op_ret,
                             gf_error_to_errno (rsp.op_errno), inode,
                             &stbuf, &preparent, &postparent, xdata);

        if (xdata)
                dict_unref (xdata);

        return 0;
}

int
client4_0_mkdir_cbk (struct rpc_req *req, struct iovec *iov, int count,
                     void *myframe)
{
        gfx_common_3iatt_rsp    rsp        = {0,};
        call_frame_t     *frame      = NULL;
        struct iatt       stbuf      = {0,};
        struct iatt       preparent  = {0,};
        struct iatt       postparent = {0,};
        int               ret        = 0;
        clnt_local_t     *local      = NULL;
        inode_t          *inode      = NULL;
        xlator_t         *this       = NULL;
        dict_t           *xdata      = NULL;

        this = THIS;

        frame = myframe;

        local = frame->local;
        inode = local->loc.inode;

        if (-1 == req->rpc_status) {
                rsp.op_ret   = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }
        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_common_3iatt_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }

        ret = client_post_common_3iatt (this, &rsp, &stbuf, &preparent, &postparent,
                                        &xdata);

out:
        if (rsp.op_ret == -1 &&
            GF_IGNORE_IF_GSYNCD_SAFE_ERROR(frame, rsp.op_errno)) {
                gf_msg (this->name, fop_log_level (GF_FOP_MKDIR,
                        gf_error_to_errno (rsp.op_errno)),
                        gf_error_to_errno (rsp.op_errno),
                        PC_MSG_REMOTE_OP_FAILED,
                        "remote operation failed. Path: %s",
                        local->loc.path);
        }

        CLIENT_STACK_UNWIND (mkdir, frame, rsp.op_ret,
                             gf_error_to_errno (rsp.op_errno), inode,
                             &stbuf, &preparent, &postparent, xdata);



        if (xdata)
                dict_unref (xdata);

        return 0;
}

int
client4_0_open_cbk (struct rpc_req *req, struct iovec *iov, int count,
                    void *myframe)
{
        clnt_local_t  *local = NULL;
        call_frame_t  *frame = NULL;
        fd_t          *fd    = NULL;
        int            ret   = 0;
        gfx_open_rsp  rsp   = {0,};
        xlator_t *this       = NULL;
        dict_t  *xdata       = NULL;


        this = THIS;

        frame = myframe;
        local = frame->local;

        fd    = local->fd;

        if (-1 == req->rpc_status) {
                rsp.op_ret   = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }
        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_open_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }

        if (-1 != rsp.op_ret) {
                ret = client_add_fd_to_saved_fds (frame->this, fd, &local->loc,
                                                  local->flags, rsp.fd, 0);
                if (ret) {
                        rsp.op_ret = -1;
                        rsp.op_errno = -ret;
                        goto out;
                }
        }

        ret = xdr_to_dict (&rsp.xdata, &xdata);
out:
        if (rsp.op_ret == -1) {
                gf_msg (this->name, fop_log_level (GF_FOP_OPEN,
                        gf_error_to_errno (rsp.op_errno)),
                        gf_error_to_errno (rsp.op_errno),
                        PC_MSG_REMOTE_OP_FAILED,
                        "remote operation failed. Path: %s (%s)",
                        local->loc.path, loc_gfid_utoa (&local->loc));
        }

        CLIENT_STACK_UNWIND (open, frame, rsp.op_ret,
                             gf_error_to_errno (rsp.op_errno), fd, xdata);

        if (xdata)
                dict_unref (xdata);

        return 0;
}


int
client4_0_stat_cbk (struct rpc_req *req, struct iovec *iov, int count,
                    void *myframe)
{
        gfx_common_iatt_rsp rsp = {0,};
        call_frame_t   *frame = NULL;
        struct iatt  iatt = {0,};
        int ret = 0;
        xlator_t *this       = NULL;
        dict_t  *xdata       = NULL;

        this = THIS;

        frame = myframe;

        if (-1 == req->rpc_status) {
                rsp.op_ret   = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }
        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_common_iatt_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }

        ret = client_post_common_iatt (this, &rsp, &iatt, &xdata);
out:
        if (rsp.op_ret == -1) {
                /* stale filehandles are possible during normal operations, no
                 * need to spam the logs with these */
                if (rsp.op_errno == ESTALE) {
                        gf_msg_debug (this->name, 0,
                                      "remote operation failed: %s",
                                      strerror (gf_error_to_errno
                                                (rsp.op_errno)));
                } else {
                        gf_msg (this->name, GF_LOG_WARNING,
                                gf_error_to_errno (rsp.op_errno),
                                PC_MSG_REMOTE_OP_FAILED,
                                "remote operation failed");
                }
        }

        CLIENT_STACK_UNWIND (stat, frame, rsp.op_ret,
                             gf_error_to_errno (rsp.op_errno), &iatt, xdata);

        if (xdata)
                dict_unref (xdata);

        return 0;
}

int
client4_0_readlink_cbk (struct rpc_req *req, struct iovec *iov, int count,
                        void *myframe)
{
        gfx_readlink_rsp rsp = {0,};
        call_frame_t   *frame = NULL;
        struct iatt  iatt = {0,};
        int ret = 0;
        xlator_t *this       = NULL;
        dict_t  *xdata       = NULL;

        this = THIS;

        frame = myframe;

        if (-1 == req->rpc_status) {
                rsp.op_ret   = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }
        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_readlink_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }
        gfx_stat_to_iattx (&rsp.buf, &iatt);

        ret = xdr_to_dict (&rsp.xdata, &xdata);
out:
        if (rsp.op_ret == -1) {
                if (gf_error_to_errno(rsp.op_errno) == ENOENT) {
                        gf_msg_debug (this->name, 0, "remote operation failed:"
                                      " %s", strerror
                                          (gf_error_to_errno (rsp.op_errno)));
                } else {
                        gf_msg (this->name, GF_LOG_WARNING,
                                gf_error_to_errno (rsp.op_errno),
                                PC_MSG_REMOTE_OP_FAILED, "remote operation "
                                "failed");
                }
        }

        CLIENT_STACK_UNWIND (readlink, frame, rsp.op_ret,
                             gf_error_to_errno (rsp.op_errno), rsp.path,
                             &iatt, xdata);

        /* This is allocated by the libc while decoding RPC msg */
        /* Hence no 'GF_FREE', but just 'free' */
        free (rsp.path);

        if (xdata)
                dict_unref (xdata);

        return 0;
}

int
client4_0_unlink_cbk (struct rpc_req *req, struct iovec *iov, int count,
                      void *myframe)
{
        call_frame_t    *frame      = NULL;
        gfx_common_2iatt_rsp  rsp        = {0,};
        struct iatt      preparent  = {0,};
        struct iatt      postparent = {0,};
        int              ret        = 0;
        xlator_t *this       = NULL;
        dict_t  *xdata       = NULL;


        this = THIS;

        frame = myframe;

        if (-1 == req->rpc_status) {
                rsp.op_ret   = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }
        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_common_2iatt_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }

        ret = client_post_common_2iatt (this, &rsp, &preparent, &postparent,
                                        &xdata);

out:
        if (rsp.op_ret == -1) {
                if (gf_error_to_errno(rsp.op_errno) == ENOENT) {
                        gf_msg_debug (this->name, 0, "remote operation failed:"
                                      " %s", strerror
                                      (gf_error_to_errno (rsp.op_errno)));
                } else {
                        gf_msg (this->name, GF_LOG_WARNING,
                                gf_error_to_errno (rsp.op_errno),
                                PC_MSG_REMOTE_OP_FAILED, "remote operation "
                                "failed");
                }
        }

        CLIENT_STACK_UNWIND (unlink, frame, rsp.op_ret,
                             gf_error_to_errno (rsp.op_errno), &preparent,
                             &postparent, xdata);



        if (xdata)
                dict_unref (xdata);

        return 0;
}

int
client4_0_rmdir_cbk (struct rpc_req *req, struct iovec *iov, int count,
                     void *myframe)
{
        gfx_common_2iatt_rsp rsp = {0,};
        call_frame_t   *frame = NULL;
        struct iatt  preparent  = {0,};
        struct iatt  postparent = {0,};
        int ret = 0;
        xlator_t *this       = NULL;
        dict_t  *xdata       = NULL;


        this = THIS;

        frame = myframe;

        if (-1 == req->rpc_status) {
                rsp.op_ret   = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }
        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_common_2iatt_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }

        ret = client_post_common_2iatt (this, &rsp, &preparent, &postparent,
                                        &xdata);

out:
        if (rsp.op_ret == -1) {
                if (GF_IGNORE_IF_GSYNCD_SAFE_ERROR(frame, rsp.op_errno)) {
                        gf_msg (this->name, GF_LOG_WARNING,
                                gf_error_to_errno (rsp.op_errno),
                                PC_MSG_REMOTE_OP_FAILED,
                                "remote operation failed");
                }
        }
        CLIENT_STACK_UNWIND (rmdir, frame, rsp.op_ret,
                             gf_error_to_errno (rsp.op_errno), &preparent,
                             &postparent, xdata);

        if (xdata)
                dict_unref (xdata);

        return 0;
}


int
client4_0_truncate_cbk (struct rpc_req *req, struct iovec *iov, int count,
                        void *myframe)
{
        gfx_common_2iatt_rsp rsp = {0,};
        call_frame_t   *frame = NULL;
        struct iatt  prestat  = {0,};
        struct iatt  poststat = {0,};
        int ret = 0;
        xlator_t *this       = NULL;
        dict_t  *xdata       = NULL;

        this = THIS;

        frame = myframe;

        if (-1 == req->rpc_status) {
                rsp.op_ret   = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }
        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_common_2iatt_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }

        ret = client_post_common_2iatt (this, &rsp, &prestat, &poststat,
                                        &xdata);

out:
        if (rsp.op_ret == -1) {
                gf_msg (this->name, GF_LOG_WARNING,
                        gf_error_to_errno (rsp.op_errno),
                        PC_MSG_REMOTE_OP_FAILED,
                        "remote operation failed");
        }
        CLIENT_STACK_UNWIND (truncate, frame, rsp.op_ret,
                             gf_error_to_errno (rsp.op_errno), &prestat,
                             &poststat, xdata);



        if (xdata)
                dict_unref (xdata);

        return 0;
}


int
client4_0_statfs_cbk (struct rpc_req *req, struct iovec *iov, int count,
                      void *myframe)
{
        gfx_statfs_rsp rsp = {0,};
        call_frame_t   *frame = NULL;
        struct statvfs  statfs = {0,};
        int ret = 0;
        xlator_t *this       = NULL;
        dict_t  *xdata       = NULL;

        this = THIS;

        frame = myframe;

        if (-1 == req->rpc_status) {
                rsp.op_ret   = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }
        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_statfs_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }

        if (-1 != rsp.op_ret) {
                gf_statfs_to_statfs (&rsp.statfs, &statfs);
        }
        ret = xdr_to_dict (&rsp.xdata, &xdata);
out:
        if (rsp.op_ret == -1) {
                gf_msg (this->name, GF_LOG_WARNING,
                        gf_error_to_errno (rsp.op_errno),
                        PC_MSG_REMOTE_OP_FAILED,
                        "remote operation failed");
        }
        CLIENT_STACK_UNWIND (statfs, frame, rsp.op_ret,
                             gf_error_to_errno (rsp.op_errno), &statfs, xdata);

        if (xdata)
                dict_unref (xdata);

        return 0;
}


int
client4_0_writev_cbk (struct rpc_req *req, struct iovec *iov, int count,
                      void *myframe)
{
        gfx_common_2iatt_rsp rsp = {0,};
        call_frame_t   *frame = NULL;
        struct iatt  prestat  = {0,};
        struct iatt  poststat = {0,};
        int ret = 0;
        xlator_t *this       = NULL;
        dict_t  *xdata       = NULL;
        clnt_local_t    *local = NULL;

        this = THIS;

        frame = myframe;
        local = frame->local;

        if (-1 == req->rpc_status) {
                rsp.op_ret   = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }

        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_common_2iatt_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }

        ret = client_post_common_2iatt (this, &rsp, &prestat, &poststat, &xdata);
        if (ret < 0)
                goto out;
out:
        if (rsp.op_ret == -1) {
                gf_msg (this->name, GF_LOG_WARNING,
                        gf_error_to_errno (rsp.op_errno),
                        PC_MSG_REMOTE_OP_FAILED,
                        "remote operation failed");
        } else if (rsp.op_ret >= 0) {
                if (local->attempt_reopen)
                        client_attempt_reopen (local->fd, this);
        }
        CLIENT_STACK_UNWIND (writev, frame, rsp.op_ret,
                             gf_error_to_errno (rsp.op_errno), &prestat,
                             &poststat, xdata);

        if (xdata)
                dict_unref (xdata);

        return 0;
}

int
client4_0_flush_cbk (struct rpc_req *req, struct iovec *iov, int count,
                     void *myframe)
{
        call_frame_t    *frame      = NULL;
        clnt_local_t  *local      = NULL;
        xlator_t *this       = NULL;
        dict_t  *xdata       = NULL;
        gfx_common_rsp   rsp        = {0,};
        int              ret        = 0;

        frame = myframe;
        this  = THIS;
        local = frame->local;

        if (-1 == req->rpc_status) {
                rsp.op_ret   = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }
        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_common_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }

        if (rsp.op_ret >= 0 && !fd_is_anonymous (local->fd)) {
                /* Delete all saved locks of the owner issuing flush */
                ret = delete_granted_locks_owner (local->fd, &local->owner);
                gf_msg_trace (this->name, 0,
                              "deleting locks of owner (%s) returned %d",
                              lkowner_utoa (&local->owner), ret);
        }

        xdr_to_dict (&rsp.xdata, &xdata);

out:
        if (rsp.op_ret == -1) {
                gf_msg (this->name, fop_log_level (GF_FOP_FLUSH,
                        gf_error_to_errno (rsp.op_errno)),
                        gf_error_to_errno (rsp.op_errno),
                        PC_MSG_REMOTE_OP_FAILED,
                        "remote operation failed");
        }
        CLIENT_STACK_UNWIND (flush, frame, rsp.op_ret,
                             gf_error_to_errno (rsp.op_errno), xdata);

        if (xdata)
                dict_unref (xdata);

        return 0;
}

int
client4_0_fsync_cbk (struct rpc_req *req, struct iovec *iov, int count,
                     void *myframe)
{
        gfx_common_2iatt_rsp rsp = {0,};
        call_frame_t   *frame = NULL;
        struct iatt  prestat  = {0,};
        struct iatt  poststat = {0,};
        int ret = 0;
        xlator_t *this       = NULL;
        dict_t  *xdata       = NULL;


        this = THIS;

        frame = myframe;

        if (-1 == req->rpc_status) {
                rsp.op_ret   = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }

        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_common_2iatt_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }

        ret = client_post_common_2iatt (this, &rsp, &prestat, &poststat,
                                        &xdata);
        if (ret < 0)
                goto out;

out:
        if (rsp.op_ret == -1) {
                gf_msg (this->name, GF_LOG_WARNING,
                        gf_error_to_errno (rsp.op_errno),
                        PC_MSG_REMOTE_OP_FAILED,
                        "remote operation failed");
        }
        CLIENT_STACK_UNWIND (fsync, frame, rsp.op_ret,
                             gf_error_to_errno (rsp.op_errno), &prestat,
                             &poststat, xdata);
        if (xdata)
                dict_unref (xdata);

        return 0;
}

int
client4_0_setxattr_cbk (struct rpc_req *req, struct iovec *iov, int count,
                        void *myframe)
{
        call_frame_t  *frame    = NULL;
        gfx_common_rsp  rsp      = {0,};
        int            ret      = 0;
        xlator_t      *this     = NULL;
        dict_t        *xdata    = NULL;
        int            op_errno = EINVAL;

        this = THIS;

        frame = myframe;

        if (-1 == req->rpc_status) {
                rsp.op_ret   = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }

        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_common_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }

        xdr_to_dict (&rsp.xdata, &xdata);
        if (ret < 0)
                goto out;

out:
        op_errno = gf_error_to_errno (rsp.op_errno);
        if (rsp.op_ret == -1) {
                if (op_errno == ENOTSUP) {
                        gf_msg_debug (this->name, 0, "remote operation failed:"
                                      " %s", strerror (op_errno));
                } else {
                        gf_msg (this->name, GF_LOG_WARNING, op_errno,
                                PC_MSG_REMOTE_OP_FAILED, "remote operation "
                                "failed");
                }
        }

        CLIENT_STACK_UNWIND (setxattr, frame, rsp.op_ret, op_errno, xdata);

        if (xdata)
                dict_unref (xdata);

        return 0;
}

int
client4_0_getxattr_cbk (struct rpc_req *req, struct iovec *iov, int count,
                        void *myframe)
{
        gfx_common_dict_rsp  rsp      = {0,};
        call_frame_t      *frame    = NULL;
        dict_t            *dict     = NULL;
        int                op_errno = EINVAL;
        int                ret      = 0;
        clnt_local_t    *local    = NULL;
        xlator_t *this       = NULL;
        dict_t  *xdata       = NULL;


        this = THIS;

        frame = myframe;
        local = frame->local;

        if (-1 == req->rpc_status) {
                rsp.op_ret = -1;
                op_errno = ENOTCONN;
                goto out;
        }

        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_common_dict_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret = -1;
                op_errno = EINVAL;
                goto out;
        }

        op_errno = gf_error_to_errno (rsp.op_errno);
        ret = client_post_common_dict (this, &rsp, &dict, &xdata);
        if (ret) {
                op_errno = -ret;
                goto out;
        }

out:
        if (rsp.op_ret == -1) {
                if ((op_errno == ENOTSUP) || (op_errno == ENODATA) ||
                     (op_errno == ESTALE) || (op_errno == ENOENT)) {
                        gf_msg_debug (this->name, 0,
                                      "remote operation failed: %s. Path: %s "
                                      "(%s). Key: %s", strerror (op_errno),
                                      local->loc.path,
                                      loc_gfid_utoa (&local->loc),
                                      (local->name) ? local->name : "(null)");
                } else {
                        gf_msg (this->name, GF_LOG_WARNING, op_errno,
                                PC_MSG_REMOTE_OP_FAILED, "remote operation "
                                "failed. Path: %s (%s). Key: %s",
                                local->loc.path,
                                loc_gfid_utoa (&local->loc),
                                (local->name) ? local->name : "(null)");
                }
        } else {
                /* This is required as many places, `if (ret)` is checked
                   for syncop_getxattr() */
                gf_msg_debug (this->name, 0, "resetting op_ret to 0 from %d",
                              rsp.op_ret);
                rsp.op_ret = 0;
        }

        CLIENT_STACK_UNWIND (getxattr, frame, rsp.op_ret, op_errno, dict, xdata);

        if (xdata)
                dict_unref (xdata);

        if (dict)
                dict_unref (dict);

        return 0;
}

int
client4_0_fgetxattr_cbk (struct rpc_req *req, struct iovec *iov, int count,
                         void *myframe)
{
        gfx_common_dict_rsp  rsp      = {0,};
        call_frame_t       *frame    = NULL;
        dict_t             *dict     = NULL;
        int                 ret      = 0;
        int                 op_errno = EINVAL;
        xlator_t *this       = NULL;
        dict_t  *xdata       = NULL;

        this = THIS;

        frame = myframe;

        if (-1 == req->rpc_status) {
                rsp.op_ret = -1;
                op_errno = ENOTCONN;
                goto out;
        }
        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_common_dict_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret = -1;
                op_errno = EINVAL;
                goto out;
        }

        op_errno = gf_error_to_errno (rsp.op_errno);
        ret = client_post_common_dict (this, &rsp, &dict, &xdata);
        if (ret) {
                op_errno = -ret;
                goto out;
        }
out:
        if (rsp.op_ret == -1) {
                if ((op_errno == ENOTSUP) || (op_errno == ERANGE) ||
                     (op_errno == ENODATA) || (op_errno == ENOENT)) {
                        gf_msg_debug (this->name, 0,
                                      "remote operation failed: %s",
                                      strerror (op_errno));
                } else {
                        gf_msg (this->name, GF_LOG_WARNING, op_errno,
                                PC_MSG_REMOTE_OP_FAILED, "remote operation "
                                "failed");
                }
        } else {
                /* This is required as many places, `if (ret)` is checked
                   for syncop_fgetxattr() */
                gf_msg_debug (this->name, 0, "resetting op_ret to 0 from %d",
                              rsp.op_ret);
                rsp.op_ret = 0;
        }

        CLIENT_STACK_UNWIND (fgetxattr, frame, rsp.op_ret, op_errno, dict, xdata);

        if (xdata)
                dict_unref (xdata);

        if (dict)
                dict_unref (dict);

        return 0;
}

int
client4_0_removexattr_cbk (struct rpc_req *req, struct iovec *iov, int count,
                           void *myframe)
{
        call_frame_t    *frame      = NULL;
        gfx_common_rsp    rsp        = {0,};
        int              ret        = 0;
        xlator_t        *this       = NULL;
        dict_t          *xdata      = NULL;
        gf_loglevel_t    loglevel   = GF_LOG_NONE;

        this = THIS;

        frame = myframe;

        if (-1 == req->rpc_status) {
                rsp.op_ret   = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }

        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_common_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }

        xdr_to_dict (&rsp.xdata, &xdata);
out:
        if (rsp.op_ret == -1) {
                /* EPERM/EACCESS is returned some times in case of selinux
                   attributes, or other system attributes which may not be
                   possible to remove from an user process is encountered.
                   we can't treat it as an error */
                if ((ENODATA == rsp.op_errno) || (ENOATTR == rsp.op_errno) ||
                    (EPERM == rsp.op_errno) || (EACCES == rsp.op_errno))
                        loglevel = GF_LOG_DEBUG;
                else
                        loglevel = GF_LOG_WARNING;

                gf_msg (this->name, loglevel,
                        gf_error_to_errno (rsp.op_errno),
                        PC_MSG_REMOTE_OP_FAILED,
                        "remote operation failed");
        }

        CLIENT_STACK_UNWIND (removexattr, frame, rsp.op_ret,
                             gf_error_to_errno (rsp.op_errno), xdata);

        if (xdata)
                dict_unref (xdata);

        return 0;
}

int
client4_0_fremovexattr_cbk (struct rpc_req *req, struct iovec *iov, int count,
                            void *myframe)
{
        call_frame_t    *frame      = NULL;
        gfx_common_rsp    rsp        = {0,};
        int              ret        = 0;
        xlator_t *this       = NULL;
        dict_t  *xdata       = NULL;

        this = THIS;

        frame = myframe;

        if (-1 == req->rpc_status) {
                rsp.op_ret   = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }

        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_common_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }

        xdr_to_dict (&rsp.xdata, &xdata);
out:
        if (rsp.op_ret == -1) {
                gf_msg (this->name, GF_LOG_WARNING,
                        gf_error_to_errno (rsp.op_errno),
                        PC_MSG_REMOTE_OP_FAILED,
                        "remote operation failed");
        }
        CLIENT_STACK_UNWIND (fremovexattr, frame, rsp.op_ret,
                             gf_error_to_errno (rsp.op_errno), xdata);

        if (xdata)
                dict_unref (xdata);

        return 0;
}

int
client4_0_fsyncdir_cbk (struct rpc_req *req, struct iovec *iov, int count,
                        void *myframe)
{
        call_frame_t    *frame      = NULL;
        gfx_common_rsp    rsp        = {0,};
        int              ret        = 0;
        xlator_t *this       = NULL;
        dict_t  *xdata       = NULL;

        this = THIS;

        frame = myframe;

        if (-1 == req->rpc_status) {
                rsp.op_ret   = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }
        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_common_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }

        xdr_to_dict (&rsp.xdata, &xdata);

out:
        if (rsp.op_ret == -1) {
                gf_msg (this->name, GF_LOG_WARNING,
                        gf_error_to_errno (rsp.op_errno),
                        PC_MSG_REMOTE_OP_FAILED,
                        "remote operation failed");
        }
        CLIENT_STACK_UNWIND (fsyncdir, frame, rsp.op_ret,
                             gf_error_to_errno (rsp.op_errno), xdata);

        if (xdata)
                dict_unref (xdata);

        return 0;
}

int
client4_0_access_cbk (struct rpc_req *req, struct iovec *iov, int count,
                      void *myframe)
{
        call_frame_t    *frame      = NULL;
        gfx_common_rsp    rsp        = {0,};
        int              ret        = 0;
        xlator_t *this       = NULL;
        dict_t  *xdata       = NULL;

        this = THIS;

        frame = myframe;

        if (-1 == req->rpc_status) {
                rsp.op_ret   = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }
        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_common_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }

        xdr_to_dict (&rsp.xdata, &xdata);

out:
        if (rsp.op_ret == -1) {
                gf_msg (this->name, GF_LOG_WARNING,
                        gf_error_to_errno (rsp.op_errno),
                        PC_MSG_REMOTE_OP_FAILED,
                        "remote operation failed");
        }
        CLIENT_STACK_UNWIND (access, frame, rsp.op_ret,
                             gf_error_to_errno (rsp.op_errno), xdata);

        if (xdata)
                dict_unref (xdata);

        return 0;
}


int
client4_0_ftruncate_cbk (struct rpc_req *req, struct iovec *iov, int count,
                         void *myframe)
{
        gfx_common_2iatt_rsp rsp = {0,};
        call_frame_t   *frame = NULL;
        struct iatt  prestat  = {0,};
        struct iatt  poststat = {0,};
        int ret = 0;
        xlator_t *this       = NULL;
        dict_t  *xdata       = NULL;

        this = THIS;

        frame = myframe;

        if (-1 == req->rpc_status) {
                rsp.op_ret   = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }
        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_common_2iatt_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }

        ret = client_post_common_2iatt (this, &rsp, &prestat, &poststat,
                                        &xdata);

out:
        if (rsp.op_ret == -1) {
                gf_msg (this->name, GF_LOG_WARNING,
                        gf_error_to_errno (rsp.op_errno),
                        PC_MSG_REMOTE_OP_FAILED,
                        "remote operation failed");
        }
        CLIENT_STACK_UNWIND (ftruncate, frame, rsp.op_ret,
                             gf_error_to_errno (rsp.op_errno), &prestat,
                             &poststat, xdata);

        if (xdata)
                dict_unref (xdata);

        return 0;
}

int
client4_0_fstat_cbk (struct rpc_req *req, struct iovec *iov, int count,
                     void *myframe)
{
        gfx_common_iatt_rsp rsp = {0,};
        call_frame_t   *frame = NULL;
        struct iatt  stat  = {0,};
        int ret = 0;
        xlator_t *this       = NULL;
        dict_t  *xdata       = NULL;

        this = THIS;

        frame = myframe;

        if (-1 == req->rpc_status) {
                rsp.op_ret   = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }
        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_common_iatt_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }

        ret = client_post_common_iatt (this, &rsp, &stat, &xdata);

out:
        if (rsp.op_ret == -1) {
                gf_msg (this->name, GF_LOG_WARNING,
                        gf_error_to_errno (rsp.op_errno),
                        PC_MSG_REMOTE_OP_FAILED,
                        "remote operation failed");
        }
        CLIENT_STACK_UNWIND (fstat, frame, rsp.op_ret,
                             gf_error_to_errno (rsp.op_errno), &stat,  xdata);

        if (xdata)
                dict_unref (xdata);

        return 0;
}


int
client4_0_inodelk_cbk (struct rpc_req *req, struct iovec *iov, int count,
                       void *myframe)
{
        call_frame_t    *frame      = NULL;
        gfx_common_rsp    rsp        = {0,};
        int              ret        = 0;
        xlator_t *this       = NULL;
        dict_t  *xdata       = NULL;

        this = THIS;

        frame = myframe;

        if (-1 == req->rpc_status) {
                rsp.op_ret   = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }
        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_common_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }

        xdr_to_dict (&rsp.xdata, &xdata);
out:
        if (rsp.op_ret == -1) {
                gf_msg (this->name, fop_log_level (GF_FOP_INODELK,
                        gf_error_to_errno (rsp.op_errno)),
                        gf_error_to_errno (rsp.op_errno),
                        PC_MSG_REMOTE_OP_FAILED, "remote operation failed");
        }
        CLIENT_STACK_UNWIND (inodelk, frame, rsp.op_ret,
                             gf_error_to_errno (rsp.op_errno), xdata);

        if (xdata)
                dict_unref (xdata);

        return 0;
}

int
client4_0_finodelk_cbk (struct rpc_req *req, struct iovec *iov, int count,
                        void *myframe)
{
        call_frame_t  *frame = NULL;
        gfx_common_rsp rsp    = {0,};
        int           ret    = 0;
        xlator_t      *this  = NULL;
        dict_t        *xdata = NULL;
        clnt_local_t  *local = NULL;

        frame = myframe;
        this = frame->this;
        local = frame->local;

        if (-1 == req->rpc_status) {
                rsp.op_ret   = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }
        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_common_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }

        xdr_to_dict (&rsp.xdata, &xdata);
out:
        if (rsp.op_ret == -1) {
                gf_msg (this->name, fop_log_level (GF_FOP_FINODELK,
                        gf_error_to_errno (rsp.op_errno)),
                        gf_error_to_errno (rsp.op_errno),
                        PC_MSG_REMOTE_OP_FAILED, "remote operation failed");
        } else if (rsp.op_ret == 0) {
                if (local->attempt_reopen)
                        client_attempt_reopen (local->fd, this);
        }
        CLIENT_STACK_UNWIND (finodelk, frame, rsp.op_ret,
                             gf_error_to_errno (rsp.op_errno), xdata);

        if (xdata)
                dict_unref (xdata);

        return 0;
}

int
client4_0_entrylk_cbk (struct rpc_req *req, struct iovec *iov, int count,
                       void *myframe)
{
        call_frame_t    *frame      = NULL;
        gfx_common_rsp    rsp        = {0,};
        int              ret        = 0;
        xlator_t *this       = NULL;
        dict_t  *xdata       = NULL;

        this = THIS;

        frame = myframe;

        if (-1 == req->rpc_status) {
                rsp.op_ret   = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }
        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_common_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }

        xdr_to_dict (&rsp.xdata, &xdata);
out:
        if (rsp.op_ret == -1) {
                gf_msg (this->name, fop_log_level (GF_FOP_ENTRYLK,
                        gf_error_to_errno (rsp.op_errno)),
                        gf_error_to_errno (rsp.op_errno),
                        PC_MSG_REMOTE_OP_FAILED, "remote operation failed");
        }

        CLIENT_STACK_UNWIND (entrylk, frame, rsp.op_ret,
                             gf_error_to_errno (rsp.op_errno), xdata);

        if (xdata)
                dict_unref (xdata);

        return 0;
}

int
client4_0_fentrylk_cbk (struct rpc_req *req, struct iovec *iov, int count,
                        void *myframe)
{
        call_frame_t    *frame      = NULL;
        gfx_common_rsp    rsp        = {0,};
        int              ret        = 0;
        xlator_t *this       = NULL;
        dict_t  *xdata       = NULL;

        this = THIS;

        frame = myframe;

        if (-1 == req->rpc_status) {
                rsp.op_ret   = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }
        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_common_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }

        xdr_to_dict (&rsp.xdata, &xdata);

out:
        if ((rsp.op_ret == -1) &&
            (EAGAIN != gf_error_to_errno (rsp.op_errno))) {
                gf_msg (this->name, GF_LOG_WARNING,
                        gf_error_to_errno (rsp.op_errno),
                        PC_MSG_REMOTE_OP_FAILED,
                        "remote operation failed");
        }

        CLIENT_STACK_UNWIND (fentrylk, frame, rsp.op_ret,
                             gf_error_to_errno (rsp.op_errno), xdata);

        if (xdata)
                dict_unref (xdata);

        return 0;
}

int
client4_0_xattrop_cbk (struct rpc_req *req, struct iovec *iov, int count,
                       void *myframe)
{
        call_frame_t     *frame    = NULL;
        dict_t           *dict     = NULL;
        gfx_common_dict_rsp  rsp      = {0,};
        int               ret      = 0;
        int               op_errno = EINVAL;
        clnt_local_t   *local    = NULL;
        xlator_t *this       = NULL;
        dict_t  *xdata       = NULL;

        this = THIS;

        frame = myframe;
        local = frame->local;

        if (-1 == req->rpc_status) {
                rsp.op_ret = -1;
                op_errno = ENOTCONN;
                goto out;
        }
        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_common_dict_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret = -1;
                op_errno = EINVAL;
                goto out;
        }

        op_errno = rsp.op_errno;
        ret = client_post_common_dict (this, &rsp, &dict, &xdata);
        if (ret) {
                op_errno = -ret;
                goto out;
        }
out:
        if (rsp.op_ret == -1) {
                gf_msg (this->name, fop_log_level (GF_FOP_XATTROP, op_errno),
                        gf_error_to_errno (rsp.op_errno),
                        PC_MSG_REMOTE_OP_FAILED, "remote operation failed. "
                        "Path: %s (%s)",
                        local->loc.path, loc_gfid_utoa (&local->loc));
        } else {
                /* This is required as many places, `if (ret)` is checked
                   for syncop_xattrop() */
                gf_msg_debug (this->name, 0, "resetting op_ret to 0 from %d",
                              rsp.op_ret);
                rsp.op_ret = 0;
        }

        CLIENT_STACK_UNWIND (xattrop, frame, rsp.op_ret,
                             gf_error_to_errno (op_errno), dict, xdata);

        if (xdata)
                dict_unref (xdata);

        if (dict)
                dict_unref (dict);

        return 0;
}

int
client4_0_fxattrop_cbk (struct rpc_req *req, struct iovec *iov, int count,
                        void *myframe)
{
        call_frame_t      *frame    = NULL;
        dict_t            *dict     = NULL;
        dict_t            *xdata    = NULL;
        gfx_common_dict_rsp  rsp      = {0,};
        int                ret      = 0;
        int                op_errno = 0;
        clnt_local_t    *local    = NULL;
        xlator_t *this       = NULL;

        this = THIS;

        frame = myframe;
        local = frame->local;

        if (-1 == req->rpc_status) {
                rsp.op_ret   = -1;
                op_errno = ENOTCONN;
                goto out;
        }

        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_common_dict_rsp);
        if (ret < 0) {
                rsp.op_ret = -1;
                op_errno = EINVAL;
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                goto out;
        }
        op_errno = rsp.op_errno;
        ret = client_post_common_dict (this, &rsp, &dict, &xdata);
        if (ret) {
                rsp.op_ret = -1;
                op_errno = -ret;
                goto out;
        }
out:

        if (rsp.op_ret == -1) {
                gf_msg (this->name, GF_LOG_WARNING,
                        gf_error_to_errno (rsp.op_errno),
                        PC_MSG_REMOTE_OP_FAILED,
                        "remote operation failed");
        } else {
                /* This is required as many places, `if (ret)` is checked
                   for syncop_fxattrop() */
                gf_msg_debug (this->name, 0, "resetting op_ret to 0 from %d",
                              rsp.op_ret);
                rsp.op_ret = 0;

                if (local->attempt_reopen)
                        client_attempt_reopen (local->fd, this);
        }

        CLIENT_STACK_UNWIND (fxattrop, frame, rsp.op_ret,
                             gf_error_to_errno (op_errno), dict, xdata);
        if (xdata)
                dict_unref (xdata);

        if (dict)
                dict_unref (dict);

        return 0;
}

int
client4_0_fsetxattr_cbk (struct rpc_req *req, struct iovec *iov, int count,
                         void *myframe)
{
        call_frame_t  *frame    = NULL;
        gfx_common_rsp  rsp      = {0,};
        int            ret      = 0;
        xlator_t      *this     = NULL;
        dict_t        *xdata    = NULL;
        int            op_errno = EINVAL;

        this = THIS;

        frame = myframe;

        if (-1 == req->rpc_status) {
                rsp.op_ret   = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }
        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_common_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }

        xdr_to_dict (&rsp.xdata, &xdata);

out:
        op_errno = gf_error_to_errno (rsp.op_errno);
        if (rsp.op_ret == -1) {
                if (op_errno == ENOTSUP) {
                        gf_msg_debug (this->name, 0, "remote operation failed:"
                                      " %s", strerror (op_errno));
                } else {
                        gf_msg (this->name, GF_LOG_WARNING, rsp.op_errno,
                                PC_MSG_REMOTE_OP_FAILED, "remote operation "
                                "failed");
                }
        }

        CLIENT_STACK_UNWIND (fsetxattr, frame, rsp.op_ret, op_errno, xdata);

        if (xdata)
                dict_unref (xdata);

        return 0;
}

int
client4_0_fallocate_cbk (struct rpc_req *req, struct iovec *iov, int count,
                        void *myframe)
{
        call_frame_t    *frame      = NULL;
        gfx_common_2iatt_rsp rsp      = {0,};
        struct iatt      prestat    = {0,};
        struct iatt      poststat   = {0,};
        int              ret        = 0;
        xlator_t *this       = NULL;
        dict_t  *xdata       = NULL;

        this = THIS;

        frame = myframe;

        if (-1 == req->rpc_status) {
                rsp.op_ret   = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }
        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_common_2iatt_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }

        ret = client_post_common_2iatt (this, &rsp, &prestat, &poststat, &xdata);
        if (ret < 0)
                goto out;

out:
        if (rsp.op_ret == -1) {
                gf_msg (this->name, GF_LOG_WARNING,
                        gf_error_to_errno (rsp.op_errno),
                        PC_MSG_REMOTE_OP_FAILED,
                        "remote operation failed");
        }
        CLIENT_STACK_UNWIND (fallocate, frame, rsp.op_ret,
                             gf_error_to_errno (rsp.op_errno), &prestat,
                             &poststat, xdata);

        if (xdata)
                dict_unref (xdata);

        return 0;
}

int
client4_0_discard_cbk(struct rpc_req *req, struct iovec *iov, int count,
                      void *myframe)
{
        gfx_common_2iatt_rsp rsp      = {0,};
        call_frame_t    *frame      = NULL;
        struct iatt      prestat    = {0,};
        struct iatt      poststat   = {0,};
        int              ret        = 0;
        xlator_t *this       = NULL;
        dict_t  *xdata       = NULL;

        this = THIS;

        frame = myframe;

        if (-1 == req->rpc_status) {
                rsp.op_ret   = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }
        ret = xdr_to_generic(*iov, &rsp, (xdrproc_t) xdr_gfx_common_2iatt_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }

        ret = client_post_common_2iatt (this, &rsp, &prestat, &poststat, &xdata);

out:
        if (rsp.op_ret == -1) {
                gf_msg (this->name, GF_LOG_WARNING,
                        gf_error_to_errno (rsp.op_errno),
                        PC_MSG_REMOTE_OP_FAILED,
                        "remote operation failed");
        }
        CLIENT_STACK_UNWIND (discard, frame, rsp.op_ret,
                             gf_error_to_errno (rsp.op_errno), &prestat,
                             &poststat, xdata);
        if (xdata)
                dict_unref (xdata);

        return 0;
}

int
client4_0_zerofill_cbk(struct rpc_req *req, struct iovec *iov, int count,
                      void *myframe)
{
        call_frame_t    *frame         = NULL;
        gfx_common_2iatt_rsp rsp          = {0,};
        struct iatt      prestat       = {0,};
        struct iatt      poststat      = {0,};
        int              ret           = 0;
        xlator_t *this                 = NULL;
        dict_t  *xdata                 = NULL;

        this = THIS;

        frame = myframe;

        if (-1 == req->rpc_status) {
                rsp.op_ret   = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }
        ret = xdr_to_generic(*iov, &rsp, (xdrproc_t) xdr_gfx_common_2iatt_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }

        ret = client_post_common_2iatt (this, &rsp, &prestat, &poststat, &xdata);
out:
        if (rsp.op_ret == -1) {
                gf_msg (this->name, GF_LOG_WARNING,
                        gf_error_to_errno (rsp.op_errno),
                        PC_MSG_REMOTE_OP_FAILED,
                        "remote operation failed");
        }
        CLIENT_STACK_UNWIND (zerofill, frame, rsp.op_ret,
                             gf_error_to_errno (rsp.op_errno), &prestat,
                             &poststat, xdata);

        if (xdata)
                dict_unref (xdata);

        return 0;
}

int
client4_0_ipc_cbk (struct rpc_req *req, struct iovec *iov, int count,
                      void *myframe)
{
        call_frame_t    *frame         = NULL;
        gfx_common_rsp   rsp          = {0,};
        int              ret           = 0;
        xlator_t *this                 = NULL;
        dict_t  *xdata                 = NULL;

        this = THIS;

        frame = myframe;

        if (-1 == req->rpc_status) {
                rsp.op_ret   = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }
        ret = xdr_to_generic(*iov, &rsp, (xdrproc_t) xdr_gfx_common_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }

        xdr_to_dict (&rsp.xdata, &xdata);
out:
        if (rsp.op_ret == -1) {
                gf_msg (this->name, GF_LOG_WARNING,
                        gf_error_to_errno (rsp.op_errno),
                        PC_MSG_REMOTE_OP_FAILED,
                        "remote operation failed");
        }
        CLIENT_STACK_UNWIND (ipc, frame,
                             rsp.op_ret, gf_error_to_errno (rsp.op_errno),
                             xdata);

        if (xdata)
                dict_unref (xdata);

        return 0;
}


int
client4_0_seek_cbk (struct rpc_req *req, struct iovec *iov, int count,
                    void *myframe)
{
        call_frame_t          *frame     = NULL;
        struct gfx_seek_rsp   rsp       = {0,};
        int                    ret       = 0;
        xlator_t              *this      = NULL;
        dict_t                *xdata     = NULL;

        this = THIS;

        frame = myframe;

        if (-1 == req->rpc_status) {
                rsp.op_ret   = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }
        ret = xdr_to_generic(*iov, &rsp, (xdrproc_t) xdr_gfx_seek_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }

        xdr_to_dict (&rsp.xdata, &xdata);
out:
        if (rsp.op_ret == -1) {
                gf_msg (this->name, GF_LOG_WARNING,
                        gf_error_to_errno (rsp.op_errno),
                        PC_MSG_REMOTE_OP_FAILED,
                        "remote operation failed");
        }
        CLIENT_STACK_UNWIND (seek, frame,
                             rsp.op_ret, gf_error_to_errno (rsp.op_errno),
                             rsp.offset, xdata);

        if (xdata)
                dict_unref (xdata);

        return 0;
}

int
client4_0_setattr_cbk (struct rpc_req *req, struct iovec *iov, int count,
                       void *myframe)
{
        gfx_common_2iatt_rsp rsp        = {0,};
        call_frame_t    *frame      = NULL;
        struct iatt      prestat    = {0,};
        struct iatt      poststat   = {0,};
        int              ret        = 0;
        xlator_t *this       = NULL;
        dict_t  *xdata       = NULL;

        this = THIS;

        frame = myframe;

        if (-1 == req->rpc_status) {
                rsp.op_ret   = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }

        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_common_2iatt_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }

        ret = client_post_common_2iatt (this, &rsp, &prestat, &poststat, &xdata);

out:
        if (rsp.op_ret == -1) {
                gf_msg (this->name, GF_LOG_WARNING,
                        gf_error_to_errno (rsp.op_errno),
                        PC_MSG_REMOTE_OP_FAILED,
                        "remote operation failed");
        }
        CLIENT_STACK_UNWIND (setattr, frame, rsp.op_ret,
                             gf_error_to_errno (rsp.op_errno), &prestat,
                             &poststat, xdata);

        if (xdata)
                dict_unref (xdata);

        return 0;
}

int
client4_0_fsetattr_cbk (struct rpc_req *req, struct iovec *iov, int count,
                       void *myframe)
{
        gfx_common_2iatt_rsp rsp        = {0,};
        call_frame_t    *frame      = NULL;
        struct iatt      prestat    = {0,};
        struct iatt      poststat   = {0,};
        int              ret        = 0;
        xlator_t *this       = NULL;
        dict_t  *xdata       = NULL;

        this = THIS;

        frame = myframe;

        if (-1 == req->rpc_status) {
                rsp.op_ret   = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }

        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_common_2iatt_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }

        ret = client_post_common_2iatt (this, &rsp, &prestat, &poststat, &xdata);

out:
        if (rsp.op_ret == -1) {
                gf_msg (this->name, GF_LOG_WARNING,
                        gf_error_to_errno (rsp.op_errno),
                        PC_MSG_REMOTE_OP_FAILED,
                        "remote operation failed");
        }
        CLIENT_STACK_UNWIND (fsetattr, frame, rsp.op_ret,
                             gf_error_to_errno (rsp.op_errno), &prestat,
                             &poststat, xdata);

        if (xdata)
                dict_unref (xdata);

        return 0;
}

int
client4_0_create_cbk (struct rpc_req *req, struct iovec *iov, int count,
                      void *myframe)
{
        call_frame_t    *frame      = NULL;
        fd_t            *fd         = NULL;
        inode_t         *inode      = NULL;
        struct iatt      stbuf      = {0, };
        struct iatt      preparent  = {0, };
        struct iatt      postparent = {0, };
        int32_t          ret        = -1;
        clnt_local_t    *local      = NULL;
        gfx_create_rsp  rsp        = {0,};
        xlator_t *this       = NULL;
        dict_t  *xdata       = NULL;

        this = THIS;

        frame = myframe;
        local = frame->local;
        fd    = local->fd;
        inode = local->loc.inode;

        if (-1 == req->rpc_status) {
                rsp.op_ret   = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }

        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_create_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }

        if (-1 != rsp.op_ret) {
                ret = client_post_create_v2 (this, &rsp, &stbuf,
                                             &preparent, &postparent,
                                             local, &xdata);
                if (ret < 0)
                        goto out;
                ret = client_add_fd_to_saved_fds (frame->this, fd, &local->loc,
                                                  local->flags, rsp.fd, 0);
                if (ret) {
                        rsp.op_ret = -1;
                        rsp.op_errno = -ret;
                        goto out;
                }
        }


out:
        if (rsp.op_ret == -1) {
                gf_msg (this->name, GF_LOG_WARNING,
                        gf_error_to_errno (rsp.op_errno),
                        PC_MSG_REMOTE_OP_FAILED,
                        "remote operation failed. Path: %s",
                        local->loc.path);
        }

        CLIENT_STACK_UNWIND (create, frame, rsp.op_ret,
                             gf_error_to_errno (rsp.op_errno), fd, inode,
                             &stbuf, &preparent, &postparent, xdata);

        if (xdata)
                dict_unref (xdata);

        return 0;
}

int
client4_0_lease_cbk (struct rpc_req *req, struct iovec *iov, int count,
                     void *myframe)
{
        call_frame_t     *frame      = NULL;
        struct gf_lease   lease      = {0,};
        gfx_lease_rsp    rsp        = {0,};
        int               ret        = 0;
        xlator_t         *this       = NULL;
        dict_t           *xdata      = NULL;

        this = THIS;

        frame = myframe;

        if (-1 == req->rpc_status) {
                gf_msg (this->name, GF_LOG_ERROR, ENOTCONN,
                        PC_MSG_REMOTE_OP_FAILED, "Lease fop failed");
                rsp.op_ret   = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }

        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_lease_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }

        ret = client_post_lease_v2 (this, &rsp, &lease, &xdata);

out:
        if (rsp.op_ret == -1) {
                gf_msg (this->name, GF_LOG_WARNING,
                        gf_error_to_errno (rsp.op_errno),
                        PC_MSG_REMOTE_OP_FAILED,
                        "remote operation failed");
        }

        CLIENT_STACK_UNWIND (lease, frame, rsp.op_ret,
                             gf_error_to_errno (rsp.op_errno), &lease, xdata);

        if (xdata)
                dict_unref (xdata);

        return 0;
}

int
client4_0_lk_cbk (struct rpc_req *req, struct iovec *iov, int count,
                  void *myframe)
{
        call_frame_t    *frame      = NULL;
        struct gf_flock     lock       = {0,};
        gfx_lk_rsp      rsp        = {0,};
        int              ret        = 0;
        xlator_t *this       = NULL;
        dict_t  *xdata       = NULL;

        this = THIS;

        frame = myframe;

        if (-1 == req->rpc_status) {
                rsp.op_ret   = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }

        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_lk_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }

        if (rsp.op_ret >= 0) {
                ret = client_post_lk_v2 (this, &rsp, &lock, &xdata);
                if (ret < 0)
                        goto out;
        }

out:
        if ((rsp.op_ret == -1) &&
            (EAGAIN != gf_error_to_errno (rsp.op_errno))) {
                gf_msg (this->name, GF_LOG_WARNING,
                        gf_error_to_errno (rsp.op_errno),
                        PC_MSG_REMOTE_OP_FAILED,
                        "remote operation failed");
        }

        CLIENT_STACK_UNWIND (lk, frame, rsp.op_ret,
                             gf_error_to_errno (rsp.op_errno), &lock, xdata);

        free (rsp.flock.lk_owner.lk_owner_val);

        if (xdata)
                dict_unref (xdata);

        return 0;
}

int
client4_0_readdir_cbk (struct rpc_req *req, struct iovec *iov, int count,
                       void *myframe)
{
        call_frame_t     *frame    = NULL;
        gfx_readdir_rsp  rsp      = {0,};
        int32_t           ret      = 0;
        clnt_local_t     *local    = NULL;
        gf_dirent_t       entries;
        xlator_t         *this     = NULL;
        dict_t           *xdata    = NULL;

        this = THIS;

        frame = myframe;
        local = frame->local;

        INIT_LIST_HEAD (&entries.list);

        if (-1 == req->rpc_status) {
                rsp.op_ret   = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }

        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_readdir_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }

        ret = client_post_readdir_v2 (this, &rsp, &entries, &xdata);

out:
        if (rsp.op_ret == -1) {
                gf_msg (this->name, GF_LOG_WARNING,
                        gf_error_to_errno (rsp.op_errno),
                        PC_MSG_REMOTE_OP_FAILED,
                        "remote operation failed: remote_fd = %d",
                        local->cmd);
        }
        CLIENT_STACK_UNWIND (readdir, frame, rsp.op_ret,
                             gf_error_to_errno (rsp.op_errno), &entries, xdata);

        if (rsp.op_ret != -1) {
                gf_dirent_free (&entries);
        }

        if (xdata)
                dict_unref (xdata);

        clnt_readdir_rsp_cleanup_v2 (&rsp);

        return 0;
}

int
client4_0_readdirp_cbk (struct rpc_req *req, struct iovec *iov, int count,
                        void *myframe)
{
        call_frame_t      *frame = NULL;
        gfx_readdirp_rsp  rsp   = {0,};
        int32_t            ret   = 0;
        clnt_local_t      *local = NULL;
        gf_dirent_t        entries;
        xlator_t          *this  = NULL;
        dict_t            *xdata = NULL;

        this = THIS;

        frame = myframe;
        local = frame->local;

        INIT_LIST_HEAD (&entries.list);

        if (-1 == req->rpc_status) {
                rsp.op_ret   = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }

        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_readdirp_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }

        ret = client_post_readdirp_v2 (this, &rsp, local->fd, &entries, &xdata);
out:
        if (rsp.op_ret == -1) {
                gf_msg (this->name, GF_LOG_WARNING,
                        gf_error_to_errno (rsp.op_errno),
                        PC_MSG_REMOTE_OP_FAILED,
                        "remote operation failed");
        }
        CLIENT_STACK_UNWIND (readdirp, frame, rsp.op_ret,
                             gf_error_to_errno (rsp.op_errno), &entries, xdata);

        if (rsp.op_ret != -1) {
                gf_dirent_free (&entries);
        }


        if (xdata)
                dict_unref (xdata);

        clnt_readdirp_rsp_cleanup_v2 (&rsp);

        return 0;
}

int
client4_0_rename_cbk (struct rpc_req *req, struct iovec *iov, int count,
                      void *myframe)
{
        call_frame_t     *frame      = NULL;
        gfx_rename_rsp   rsp        = {0,};
        struct iatt       stbuf      = {0,};
        struct iatt       preoldparent  = {0,};
        struct iatt       postoldparent = {0,};
        struct iatt       prenewparent  = {0,};
        struct iatt       postnewparent = {0,};
        int               ret        = 0;
        xlator_t *this       = NULL;
        dict_t  *xdata       = NULL;

        this = THIS;

        frame = myframe;

        if (-1 == req->rpc_status) {
                rsp.op_ret   = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }

        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_rename_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }

        client_post_rename_v2 (this, &rsp, &stbuf, &preoldparent,
                               &postoldparent, &prenewparent,
                               &postnewparent, &xdata);
out:
        if (rsp.op_ret == -1) {
                gf_msg (this->name, GF_LOG_WARNING,
                        gf_error_to_errno (rsp.op_errno),
                        PC_MSG_REMOTE_OP_FAILED,
                        "remote operation failed");
        }
        CLIENT_STACK_UNWIND (rename, frame, rsp.op_ret,
                             gf_error_to_errno (rsp.op_errno),
                             &stbuf, &preoldparent, &postoldparent,
                             &prenewparent, &postnewparent, xdata);

        if (xdata)
                dict_unref (xdata);

        return 0;
}

int
client4_0_link_cbk (struct rpc_req *req, struct iovec *iov, int count,
                    void *myframe)
{
        gfx_common_3iatt_rsp     rsp        = {0,};
        call_frame_t     *frame      = NULL;
        struct iatt       stbuf      = {0,};
        struct iatt       preparent  = {0,};
        struct iatt       postparent = {0,};
        int               ret        = 0;
        clnt_local_t     *local      = NULL;
        inode_t          *inode      = NULL;
        xlator_t *this       = NULL;
        dict_t  *xdata       = NULL;

        this = THIS;

        frame = myframe;

        local = frame->local;
        inode = local->loc.inode;

        if (-1 == req->rpc_status) {
                rsp.op_ret   = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }

        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_common_3iatt_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }

        ret = client_post_common_3iatt (this, &rsp, &stbuf, &preparent,
                                        &postparent, &xdata);
out:
        if (rsp.op_ret == -1) {
                if (GF_IGNORE_IF_GSYNCD_SAFE_ERROR(frame, rsp.op_errno)) {
                        gf_msg (this->name, GF_LOG_WARNING,
                                gf_error_to_errno (rsp.op_errno),
                                PC_MSG_REMOTE_OP_FAILED,
                                "remote operation failed: (%s -> %s)",
                                local->loc.path, local->loc2.path);
                }
        }

        CLIENT_STACK_UNWIND (link, frame, rsp.op_ret,
                             gf_error_to_errno (rsp.op_errno), inode,
                             &stbuf, &preparent, &postparent, xdata);

        if (xdata)
                dict_unref (xdata);

        return 0;
}

int
client4_0_opendir_cbk (struct rpc_req *req, struct iovec *iov, int count,
                       void *myframe)
{
        clnt_local_t      *local = NULL;
        call_frame_t      *frame = NULL;
        fd_t              *fd = NULL;
        int ret = 0;
        gfx_open_rsp  rsp = {0,};
        xlator_t *this       = NULL;
        dict_t  *xdata       = NULL;

        this = THIS;

        frame = myframe;
        local = frame->local;

        fd    = local->fd;

        if (-1 == req->rpc_status) {
                rsp.op_ret   = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }

        /* open and opendir are two operations dealing with same thing,
           but separated by fop number only */
        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_open_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }

        if (-1 != rsp.op_ret) {
                ret = client_add_fd_to_saved_fds (frame->this, fd, &local->loc,
                                                  0, rsp.fd, 1);
                if (ret) {
                        rsp.op_ret = -1;
                        rsp.op_errno = -ret;
                        goto out;
                }
        }

        ret = xdr_to_dict (&rsp.xdata, &xdata);
out:
        if (rsp.op_ret == -1) {
                gf_msg (this->name, fop_log_level (GF_FOP_OPENDIR,
                        gf_error_to_errno (rsp.op_errno)),
                        gf_error_to_errno (rsp.op_errno),
                        PC_MSG_REMOTE_OP_FAILED, "remote operation failed."
                        " Path: %s (%s)",
                        local->loc.path, loc_gfid_utoa (&local->loc));
        }
        CLIENT_STACK_UNWIND (opendir, frame, rsp.op_ret,
                             gf_error_to_errno (rsp.op_errno), fd, xdata);

        if (xdata)
                dict_unref (xdata);

        return 0;
}


int
client4_0_lookup_cbk (struct rpc_req *req, struct iovec *iov, int count,
                      void *myframe)
{
        gfx_common_2iatt_rsp  rsp        = {0,};
        clnt_local_t    *local      = NULL;
        call_frame_t    *frame      = NULL;
        int              ret        = 0;
        struct iatt      stbuf      = {0,};
        struct iatt      postparent = {0,};
        int              op_errno   = EINVAL;
        dict_t          *xdata      = NULL;
        inode_t         *inode      = NULL;
        xlator_t        *this       = NULL;

        this = THIS;

        frame = myframe;
        local = frame->local;
        inode = local->loc.inode;

        if (-1 == req->rpc_status) {
                rsp.op_ret   = -1;
                op_errno = ENOTCONN;
                goto out;
        }

        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_common_2iatt_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret   = -1;
                op_errno = EINVAL;
                goto out;
        }

        /* Preserve the op_errno received from the server */
        op_errno = gf_error_to_errno (rsp.op_errno);

        ret = client_post_common_2iatt (this, &rsp, &stbuf, &postparent, &xdata);
        if (ret < 0) {
                /* Don't change the op_errno if the fop failed on server */
                if (rsp.op_ret == 0)
                        op_errno = rsp.op_errno;
                rsp.op_ret = -1;
                goto out;
        }

        if (rsp.op_ret < 0)
                goto out;

        if ((!gf_uuid_is_null (inode->gfid))
            && (gf_uuid_compare (stbuf.ia_gfid, inode->gfid) != 0)) {
                gf_msg_debug (frame->this->name, 0,
                              "gfid changed for %s", local->loc.path);

                rsp.op_ret = -1;
                op_errno = ESTALE;
                if (xdata)
                        ret = dict_set_int32 (xdata, "gfid-changed", 1);

                goto out;
        }

        rsp.op_ret = 0;

out:
        /* Restore the correct op_errno to rsp.op_errno */
        rsp.op_errno = op_errno;
        if (rsp.op_ret == -1) {
                /* any error other than ENOENT */
                if (!(local->loc.name && rsp.op_errno == ENOENT) &&
                    !(rsp.op_errno == ESTALE))
                        gf_msg (this->name, GF_LOG_WARNING, rsp.op_errno,
                                PC_MSG_REMOTE_OP_FAILED, "remote operation "
                                "failed. Path: %s (%s)",
                                local->loc.path,
                                loc_gfid_utoa (&local->loc));
                else
                        gf_msg_trace (this->name, 0, "not found on remote "
                                      "node");

        }

        CLIENT_STACK_UNWIND (lookup, frame, rsp.op_ret, rsp.op_errno, inode,
                             &stbuf, xdata, &postparent);

        if (xdata)
                dict_unref (xdata);



        return 0;
}

int
client4_0_readv_cbk (struct rpc_req *req, struct iovec *iov, int count,
                     void *myframe)
{
        call_frame_t   *frame  = NULL;
        struct iobref  *iobref = NULL;
        struct iovec    vector[MAX_IOVEC] = {{0}, };
        struct iatt     stat   = {0,};
        gfx_read_rsp   rsp    = {0,};
        int             ret    = 0, rspcount = 0;
        clnt_local_t   *local  = NULL;
        xlator_t *this       = NULL;
        dict_t  *xdata       = NULL;

        this = THIS;

        memset (vector, 0, sizeof (vector));

        frame = myframe;
        local = frame->local;

        if (-1 == req->rpc_status) {
                rsp.op_ret   = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }

        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_read_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }

        ret = client_post_readv_v2 (this, &rsp, &iobref, req->rsp_iobref,
                                    &stat, vector, &req->rsp[1],
                                    &rspcount, &xdata);
out:
        if (rsp.op_ret == -1) {
                gf_msg (this->name, GF_LOG_WARNING,
                        gf_error_to_errno (rsp.op_errno),
                        PC_MSG_REMOTE_OP_FAILED,
                        "remote operation failed");
        } else if (rsp.op_ret >= 0) {
                if (local->attempt_reopen)
                        client_attempt_reopen (local->fd, this);
        }
        CLIENT_STACK_UNWIND (readv, frame, rsp.op_ret,
                             gf_error_to_errno (rsp.op_errno), vector, rspcount,
                             &stat, iobref, xdata);



        if (xdata)
                dict_unref (xdata);

        return 0;
}

int
client4_0_release_cbk (struct rpc_req *req, struct iovec *iov, int count,
                       void *myframe)
{
        call_frame_t   *frame = NULL;

        frame = myframe;
        STACK_DESTROY (frame->root);
        return 0;
}
int
client4_0_releasedir_cbk (struct rpc_req *req, struct iovec *iov, int count,
                          void *myframe)
{
        call_frame_t   *frame = NULL;

        frame = myframe;
        STACK_DESTROY (frame->root);
        return 0;
}

int
client4_0_getactivelk_cbk (struct rpc_req *req, struct iovec *iov, int count,
                           void *myframe)
{
        call_frame_t            *frame = NULL;
        gfx_getactivelk_rsp   rsp   = {0,};
        int32_t                 ret   = 0;
        lock_migration_info_t   locklist;
        xlator_t                *this  = NULL;
        dict_t                  *xdata = NULL;

        this = THIS;

        frame = myframe;

        if (-1 == req->rpc_status) {
                rsp.op_ret   = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }

        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_getactivelk_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }

        INIT_LIST_HEAD (&locklist.list);

        if (rsp.op_ret > 0) {
                clnt_unserialize_rsp_locklist_v2 (this, &rsp, &locklist);
        }

        xdr_to_dict (&rsp.xdata, &xdata);

out:
        if (rsp.op_ret == -1) {
                gf_msg (this->name, GF_LOG_WARNING,
                        gf_error_to_errno (rsp.op_errno),
                        PC_MSG_REMOTE_OP_FAILED,
                        "remote operation failed");
        }

        CLIENT_STACK_UNWIND (getactivelk, frame, rsp.op_ret,
                             gf_error_to_errno (rsp.op_errno), &locklist,
                             xdata);
        if (xdata)
                dict_unref (xdata);

        clnt_getactivelk_rsp_cleanup_v2 (&rsp);

        return 0;
}

int
client4_0_setactivelk_cbk (struct rpc_req *req, struct iovec *iov, int count,
                             void *myframe)
{
        call_frame_t            *frame = NULL;
        gfx_common_rsp     rsp   = {0,};
        int32_t                  ret   = 0;
        xlator_t                *this  = NULL;
        dict_t                  *xdata = NULL;

        this = THIS;

        frame = myframe;

        if (-1 == req->rpc_status) {
                rsp.op_ret   = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }

        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_common_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }

        xdr_to_dict (&rsp.xdata, &xdata);
out:
        if (rsp.op_ret == -1) {
                gf_msg (this->name, GF_LOG_WARNING,
                        gf_error_to_errno (rsp.op_errno),
                        PC_MSG_REMOTE_OP_FAILED,
                        "remote operation failed");
        }

        CLIENT_STACK_UNWIND (setactivelk, frame, rsp.op_ret,
                             gf_error_to_errno (rsp.op_errno), xdata);

        if (xdata)
                dict_unref (xdata);

        return 0;
}


int32_t
client4_0_releasedir (call_frame_t *frame, xlator_t *this,
                      void *data)
{
        clnt_conf_t         *conf        = NULL;
        clnt_fd_ctx_t       *fdctx       = NULL;
        clnt_args_t         *args        = NULL;
        int64_t              remote_fd   = -1;
        gf_boolean_t         destroy     = _gf_false;

        if (!this || !data)
                goto out;

        args = data;
        conf = this->private;

        pthread_spin_lock (&conf->fd_lock);
        {
                fdctx = this_fd_del_ctx (args->fd, this);
                if (fdctx != NULL) {
                        remote_fd = fdctx->remote_fd;

                        /* fdctx->remote_fd == -1 indicates a reopen attempt
                           in progress. Just mark ->released = 1 and let
                           reopen_cbk handle releasing
                        */

                        if (remote_fd == -1) {
                                fdctx->released = 1;
                        } else {
                                list_del_init (&fdctx->sfd_pos);
                                destroy = _gf_true;
                        }
                }
        }
        pthread_spin_unlock (&conf->fd_lock);

        if (destroy)
                client_fdctx_destroy (this, fdctx);

out:

        return 0;
}

int32_t
client4_0_release (call_frame_t *frame, xlator_t *this,
                   void *data)
{
        int64_t           remote_fd     = -1;
        clnt_conf_t      *conf          = NULL;
        clnt_fd_ctx_t    *fdctx         = NULL;
        clnt_args_t      *args          = NULL;
        gf_boolean_t      destroy       = _gf_false;

        if (!this || !data)
                goto out;

        args = data;
        conf = this->private;

        pthread_spin_lock (&conf->fd_lock);
        {
                fdctx = this_fd_del_ctx (args->fd, this);
                if (fdctx != NULL) {
                        remote_fd     = fdctx->remote_fd;

                        /* fdctx->remote_fd == -1 indicates a reopen attempt
                           in progress. Just mark ->released = 1 and let
                           reopen_cbk handle releasing
                        */
                        if (remote_fd == -1) {
                                fdctx->released = 1;
                        } else {
                                list_del_init (&fdctx->sfd_pos);
                                destroy = _gf_true;
                        }
                }
        }
        pthread_spin_unlock (&conf->fd_lock);

        if (destroy)
                client_fdctx_destroy (this, fdctx);
out:
        return 0;
}


int32_t
client4_0_lookup (call_frame_t *frame, xlator_t *this,
                  void *data)
{
        clnt_conf_t     *conf              = NULL;
        clnt_local_t    *local             = NULL;
        clnt_args_t     *args              = NULL;
        gfx_lookup_req  req               = {{0,},};
        int              ret               = 0;
        int              op_errno          = ESTALE;
        data_t          *content           = NULL;
        struct iovec     vector[MAX_IOVEC] = {{0}, };
        int              count             = 0;
        struct iobref   *rsp_iobref        = NULL;
        struct iobuf    *rsp_iobuf         = NULL;
        struct iovec    *rsphdr            = NULL;

        if (!frame || !this || !data)
                goto unwind;

        memset (vector, 0, sizeof (vector));

        conf = this->private;
        args = data;
        local = mem_get0 (this->local_pool);
        if (!local) {
                op_errno = ENOMEM;
                goto unwind;
        }
        frame->local = local;

        if (!(args->loc && args->loc->inode))
                goto unwind;

        loc_copy (&local->loc, args->loc);
        loc_path (&local->loc, NULL);

        if (args->xdata) {
                content = dict_get (args->xdata, GF_CONTENT_KEY);
                if (content != NULL) {
                        rsp_iobref = iobref_new ();
                        if (rsp_iobref == NULL) {
                                goto unwind;
                        }

                        /* TODO: what is the size we should send ? */
                        /* This change very much depends on quick-read
                           changes */
                        rsp_iobuf = iobuf_get (this->ctx->iobuf_pool);
                        if (rsp_iobuf == NULL) {
                                goto unwind;
                        }

                        iobref_add (rsp_iobref, rsp_iobuf);
                        rsphdr = &vector[0];
                        rsphdr->iov_base = iobuf_ptr (rsp_iobuf);
                        rsphdr->iov_len = iobuf_pagesize (rsp_iobuf);
                        count = 1;
                        local->iobref = rsp_iobref;
                        iobuf_unref (rsp_iobuf);
                        rsp_iobuf = NULL;
                        rsp_iobref = NULL;
                }
        }

        ret = client_pre_lookup_v2 (this, &req, args->loc, args->xdata);
        if (ret) {
                op_errno = -ret;
                goto unwind;
        }
        ret = client_submit_request (this, &req, frame, conf->fops,
                                     GFS3_OP_LOOKUP, client4_0_lookup_cbk,
                                     NULL, rsphdr, count,
                                     NULL, 0, local->iobref,
                                     (xdrproc_t)xdr_gfx_lookup_req);

        if (ret) {
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");
        }

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;

unwind:
        CLIENT_STACK_UNWIND (lookup, frame, -1, op_errno, NULL, NULL, NULL,
                             NULL);

        GF_FREE (req.xdata.pairs.pairs_val);

        if (rsp_iobref)
                iobref_unref (rsp_iobref);

        return 0;
}

int32_t
client4_0_stat (call_frame_t *frame, xlator_t *this,
                void *data)
{
        clnt_conf_t   *conf     = NULL;
        clnt_args_t   *args     = NULL;
        gfx_stat_req  req      = {{0,},};
        int            ret      = 0;
        int            op_errno = ESTALE;

        if (!frame || !this || !data)
                goto unwind;

        args = data;
        conf = this->private;

        ret = client_pre_stat_v2 (this, &req, args->loc, args->xdata);
        if (ret) {
                op_errno = -ret;
                goto unwind;
        }
        ret = client_submit_request (this, &req, frame, conf->fops,
                                     GFS3_OP_STAT, client4_0_stat_cbk, NULL,
                                     NULL, 0, NULL, 0, NULL,
                                     (xdrproc_t)xdr_gfx_stat_req);
        if (ret) {
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");
        }

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
unwind:
        CLIENT_STACK_UNWIND (stat, frame, -1, op_errno, NULL, NULL);

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
}


int32_t
client4_0_truncate (call_frame_t *frame, xlator_t *this,
                    void *data)
{
        clnt_conf_t       *conf     = NULL;
        clnt_args_t       *args     = NULL;
        gfx_truncate_req  req      = {{0,},};
        int                ret      = 0;
        int                op_errno = ESTALE;

        if (!frame || !this || !data)
                goto unwind;

        args = data;
        conf = this->private;

        ret = client_pre_truncate_v2 (this, &req, args->loc, args->offset,
                                   args->xdata);
        if (ret) {
                op_errno = -ret;
                goto unwind;
        }
        ret = client_submit_request (this, &req, frame, conf->fops,
                                     GFS3_OP_TRUNCATE,
                                     client4_0_truncate_cbk, NULL,
                                     NULL, 0, NULL, 0,
                                     NULL, (xdrproc_t)xdr_gfx_truncate_req);
        if (ret) {
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");
        }

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
unwind:
        CLIENT_STACK_UNWIND (truncate, frame, -1, op_errno, NULL, NULL, NULL);
        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
}


int32_t
client4_0_ftruncate (call_frame_t *frame, xlator_t *this,
                     void *data)
{
        clnt_args_t        *args     = NULL;
        clnt_conf_t        *conf     = NULL;
        gfx_ftruncate_req  req      = {{0,},};
        int                 op_errno = EINVAL;
        int                 ret      = 0;

        if (!frame || !this || !data)
                goto unwind;

        args = data;

        conf = this->private;

        ret = client_pre_ftruncate_v2 (this, &req, args->fd, args->offset,
                                     args->xdata);
        if (ret) {
                op_errno = -ret;
                goto unwind;
        }
        ret = client_submit_request (this, &req, frame, conf->fops,
                                     GFS3_OP_FTRUNCATE,
                                     client4_0_ftruncate_cbk, NULL,
                                     NULL, 0, NULL, 0,
                                     NULL, (xdrproc_t)xdr_gfx_ftruncate_req);
        if (ret) {
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");
        }

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
unwind:
        CLIENT_STACK_UNWIND (ftruncate, frame, -1, op_errno, NULL, NULL, NULL);
        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
}


int32_t
client4_0_access (call_frame_t *frame, xlator_t *this,
                  void *data)
{
        clnt_conf_t     *conf     = NULL;
        clnt_args_t     *args     = NULL;
        gfx_access_req  req      = {{0,},};
        int              ret      = 0;
        int              op_errno = ESTALE;

        if (!frame || !this || !data)
                goto unwind;

        args = data;

        conf = this->private;


        ret = client_pre_access_v2 (this, &req, args->loc, args->mask,
                                 args->xdata);
        if (ret) {
                op_errno = -ret;
                goto unwind;
        }
        ret = client_submit_request (this, &req, frame, conf->fops,
                                     GFS3_OP_ACCESS,
                                     client4_0_access_cbk, NULL,
                                     NULL, 0, NULL, 0,
                                     NULL, (xdrproc_t)xdr_gfx_access_req);
        if (ret) {
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");
        }

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
unwind:
        CLIENT_STACK_UNWIND (access, frame, -1, op_errno, NULL);
        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
}

int32_t
client4_0_readlink (call_frame_t *frame, xlator_t *this,
                    void *data)
{
        clnt_conf_t       *conf              = NULL;
        clnt_args_t       *args              = NULL;
        gfx_readlink_req  req               = {{0,},};
        int                ret               = 0;
        int                op_errno          = ESTALE;
        clnt_local_t      *local             = NULL;

        if (!frame || !this || !data)
                goto unwind;

        args = data;

        conf = this->private;

        local = mem_get0 (this->local_pool);
        if (!local) {
                op_errno = ENOMEM;
                goto unwind;
        }

        frame->local = local;

        ret = client_pre_readlink_v2 (this, &req, args->loc, args->size,
                                      args->xdata);
        if (ret) {
                op_errno = -ret;
                goto unwind;
        }

        ret = client_submit_request (this, &req, frame, conf->fops,
                                     GFS3_OP_READLINK,
                                     client4_0_readlink_cbk, NULL,
                                     NULL, 0, NULL, 0, NULL,
                                     (xdrproc_t)xdr_gfx_readlink_req);
        if (ret) {
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");
        }

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
unwind:

        CLIENT_STACK_UNWIND (readlink, frame, -1, op_errno, NULL, NULL, NULL);
        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
}

int32_t
client4_0_unlink (call_frame_t *frame, xlator_t *this,
                  void *data)
{
        clnt_conf_t     *conf     = NULL;
        clnt_args_t     *args     = NULL;
        gfx_unlink_req  req      = {{0,},};
        int              ret      = 0;
        int              op_errno = 0;

        if (!frame || !this || !data)
                goto unwind;

        args = data;
        conf = this->private;

        ret = client_pre_unlink_v2 (this, &req, args->loc, args->flags,
                                    args->xdata);
        if (ret) {
                op_errno = -ret;
                goto unwind;
        }
        ret = client_submit_request (this, &req, frame, conf->fops,
                                     GFS3_OP_UNLINK,
                                     client4_0_unlink_cbk, NULL,
                                     NULL, 0, NULL, 0,
                                     NULL, (xdrproc_t)xdr_gfx_unlink_req);
        if (ret) {
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");
        }

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
unwind:
        CLIENT_STACK_UNWIND (unlink, frame, -1, op_errno, NULL, NULL, NULL);
        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
}


int32_t
client4_0_rmdir (call_frame_t *frame, xlator_t *this,
                 void *data)
{
        clnt_conf_t    *conf     = NULL;
        clnt_args_t    *args     = NULL;
        gfx_rmdir_req  req      = {{0,},};
        int             ret      = 0;
        int             op_errno = ESTALE;

        if (!frame || !this || !data)
                goto unwind;

        args = data;
        conf = this->private;

        ret = client_pre_rmdir_v2 (this, &req, args->loc, args->flags,
                                args->xdata);

        if (ret) {
                op_errno = -ret;
                goto unwind;
        }
        ret = client_submit_request (this, &req, frame, conf->fops,
                                     GFS3_OP_RMDIR, client4_0_rmdir_cbk, NULL,
                                     NULL, 0, NULL, 0,
                                     NULL, (xdrproc_t)xdr_gfx_rmdir_req);
        if (ret) {
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");
        }
        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
unwind:
        CLIENT_STACK_UNWIND (rmdir, frame, -1, op_errno, NULL, NULL, NULL);
        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
}



int32_t
client4_0_symlink (call_frame_t *frame, xlator_t *this,
                   void *data)
{
        clnt_local_t     *local    = NULL;
        clnt_conf_t      *conf     = NULL;
        clnt_args_t      *args     = NULL;
        gfx_symlink_req  req      = {{0,},};
        int               ret      = 0;
        int               op_errno = ESTALE;

        if (!frame || !this || !data)
                goto unwind;

        args = data;
        conf = this->private;

        local = mem_get0 (this->local_pool);
        if (!local) {
                op_errno = ENOMEM;
                goto unwind;
        }

        frame->local = local;

        if (!(args->loc && args->loc->parent))
                goto unwind;

        loc_copy (&local->loc, args->loc);
        loc_path (&local->loc, NULL);

        local->loc2.path = gf_strdup (args->linkname);

        ret = client_pre_symlink_v2 (this, &req, args->loc,
                                  args->linkname, args->umask, args->xdata);
        if (ret) {
                op_errno = -ret;
                goto unwind;
        }
        ret = client_submit_request (this, &req, frame, conf->fops,
                                     GFS3_OP_SYMLINK, client4_0_symlink_cbk,
                                     NULL,  NULL, 0, NULL,
                                     0, NULL, (xdrproc_t)xdr_gfx_symlink_req);
        if (ret) {
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");
        }

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
unwind:

        CLIENT_STACK_UNWIND (symlink, frame, -1, op_errno, NULL, NULL, NULL,
                             NULL, NULL);

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
}


int32_t
client4_0_rename (call_frame_t *frame, xlator_t *this,
                  void *data)
{
        clnt_conf_t     *conf     = NULL;
        clnt_args_t     *args     = NULL;
        gfx_rename_req  req      = {{0,},};
        int              ret      = 0;
        int              op_errno = ESTALE;

        if (!frame || !this || !data)
                goto unwind;

        args = data;
        conf = this->private;

        ret = client_pre_rename_v2 (this, &req, args->oldloc, args->newloc,
                                 args->xdata);
        if (ret) {
                op_errno = -ret;
                goto unwind;
        }
        ret = client_submit_request (this, &req, frame, conf->fops,
                                     GFS3_OP_RENAME, client4_0_rename_cbk, NULL,
                                     NULL, 0, NULL, 0,
                                     NULL, (xdrproc_t)xdr_gfx_rename_req);
        if (ret) {
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");
        }

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
unwind:
        CLIENT_STACK_UNWIND (rename, frame, -1, op_errno, NULL, NULL, NULL,
                             NULL, NULL, NULL);

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
}


int32_t
client4_0_link (call_frame_t *frame, xlator_t *this,
                void *data)
{
        clnt_local_t  *local    = NULL;
        clnt_conf_t   *conf     = NULL;
        clnt_args_t   *args     = NULL;
        gfx_link_req  req      = {{0,},};
        int            ret      = 0;
        int            op_errno = ESTALE;

        if (!frame || !this || !data)
                goto unwind;

        args = data;
        conf = this->private;

        local = mem_get0 (this->local_pool);
        if (!local) {
                op_errno = ENOMEM;
                goto unwind;
        }

        frame->local = local;

        ret = client_pre_link_v2 (this, &req, args->oldloc, args->newloc,
                               args->xdata);
        if (ret) {
                op_errno = -ret;
                goto unwind;
        }

        loc_copy (&local->loc, args->oldloc);
        loc_path (&local->loc, NULL);
        loc_copy (&local->loc2, args->newloc);
        loc_path (&local->loc2, NULL);

        ret = client_submit_request (this, &req, frame, conf->fops,
                                     GFS3_OP_LINK, client4_0_link_cbk, NULL,
                                     NULL, 0, NULL, 0, NULL,
                                     (xdrproc_t)xdr_gfx_link_req);
        if (ret) {
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");
        }

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
unwind:
        CLIENT_STACK_UNWIND (link, frame, -1, op_errno, NULL, NULL, NULL, NULL, NULL);
        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
}



int32_t
client4_0_mknod (call_frame_t *frame, xlator_t *this,
                 void *data)
{
        clnt_local_t   *local    = NULL;
        clnt_conf_t    *conf     = NULL;
        clnt_args_t    *args     = NULL;
        gfx_mknod_req  req      = {{0,},};
        int             ret      = 0;
        int             op_errno = ESTALE;

        if (!frame || !this || !data)
                goto unwind;

        args = data;
        conf = this->private;

        local = mem_get0 (this->local_pool);
        if (!local) {
                op_errno = ENOMEM;
                goto unwind;
        }
        frame->local = local;

        loc_copy (&local->loc, args->loc);
        loc_path (&local->loc, NULL);

        ret = client_pre_mknod_v2 (this, &req, args->loc,
                                args->mode, args->rdev, args->umask,
                                args->xdata);
        if (ret) {
                op_errno = -ret;
                goto unwind;
        }
        ret = client_submit_request (this, &req, frame, conf->fops,
                                     GFS3_OP_MKNOD, client4_0_mknod_cbk, NULL,
                                     NULL, 0, NULL, 0,
                                     NULL, (xdrproc_t)xdr_gfx_mknod_req);
        if (ret) {
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");
        }
        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
unwind:
        CLIENT_STACK_UNWIND (mknod, frame, -1, op_errno, NULL, NULL, NULL,
                             NULL, NULL);

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
}



int32_t
client4_0_mkdir (call_frame_t *frame, xlator_t *this,
                 void *data)
{
        clnt_local_t   *local    = NULL;
        clnt_conf_t    *conf     = NULL;
        clnt_args_t    *args     = NULL;
        gfx_mkdir_req  req      = {{0,},};
        int             ret      = 0;
        int             op_errno = ESTALE;

        if (!frame || !this || !data)
                goto unwind;

        args = data;
        conf = this->private;

        if (!args->xdata || !dict_get (args->xdata, "gfid-req")) {
                op_errno = EPERM;
                gf_msg_callingfn (this->name, GF_LOG_WARNING, op_errno,
                                  PC_MSG_GFID_NULL, "mkdir: %s is received "
                                  "without gfid-req %p", args->loc->path,
                                  args->xdata);
                goto unwind;
        }

        local = mem_get0 (this->local_pool);
        if (!local) {
                op_errno = ENOMEM;
                goto unwind;
        }
        frame->local = local;

        if (!(args->loc && args->loc->parent))
                goto unwind;

        loc_copy (&local->loc, args->loc);
        loc_path (&local->loc, NULL);

        ret = client_pre_mkdir_v2 (this, &req, args->loc, args->mode,
                                 args->umask, args->xdata);
        if (ret) {
                op_errno = -ret;
                goto unwind;
        }
        ret = client_submit_request (this, &req, frame, conf->fops,
                                     GFS3_OP_MKDIR, client4_0_mkdir_cbk, NULL,
                                     NULL, 0, NULL, 0,
                                     NULL, (xdrproc_t)xdr_gfx_mkdir_req);
        if (ret) {
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");
        }
        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
unwind:
        CLIENT_STACK_UNWIND (mkdir, frame, -1, op_errno, NULL, NULL, NULL,
                             NULL, NULL);

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
}


int32_t
client4_0_create (call_frame_t *frame, xlator_t *this,
                  void *data)
{
        clnt_local_t    *local    = NULL;
        clnt_conf_t     *conf     = NULL;
        clnt_args_t     *args     = NULL;
        gfx_create_req  req      = {{0,},};
        int              ret      = 0;
        int              op_errno = ESTALE;

        if (!frame || !this || !data)
                goto unwind;

        args = data;
        conf = this->private;

        local = mem_get0 (this->local_pool);
        if (!local) {
                op_errno = ENOMEM;
                goto unwind;
        }
        frame->local = local;

        local->fd = fd_ref (args->fd);
        local->flags = args->flags;

        loc_copy (&local->loc, args->loc);
        loc_path (&local->loc, NULL);

        ret = client_pre_create_v2 (this, &req, args->loc,
                                    args->fd, args->mode,
                                    args->flags, args->umask, args->xdata);
        if (ret) {
                op_errno = -ret;
                goto unwind;
        }
        ret = client_submit_request (this, &req, frame, conf->fops,
                                     GFS3_OP_CREATE, client4_0_create_cbk, NULL,
                                     NULL, 0, NULL, 0,
                                     NULL, (xdrproc_t)xdr_gfx_create_req);
        if (ret) {
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");
        }

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
unwind:
        CLIENT_STACK_UNWIND (create, frame, -1, op_errno, NULL, NULL, NULL,
                             NULL, NULL, NULL);

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
}



int32_t
client4_0_open (call_frame_t *frame, xlator_t *this,
                void *data)
{
        clnt_local_t  *local    = NULL;
        clnt_conf_t   *conf     = NULL;
        clnt_args_t   *args     = NULL;
        gfx_open_req  req      = {{0,},};
        int            ret      = 0;
        int            op_errno = ESTALE;

        if (!frame || !this || !data)
                goto unwind;

        args = data;

        conf = this->private;

        local = mem_get0 (this->local_pool);
        if (!local) {
                op_errno = ENOMEM;
                goto unwind;
        }
        frame->local = local;

        local->flags = args->flags;

        local->fd = fd_ref (args->fd);
        loc_copy (&local->loc, args->loc);
        loc_path (&local->loc, NULL);

        ret = client_pre_open_v2 (this, &req, args->loc, args->fd, args->flags,
                               args->xdata);

        if (ret) {
                op_errno = -ret;
                goto unwind;
        }
        ret = client_submit_request (this, &req, frame, conf->fops,
                                     GFS3_OP_OPEN, client4_0_open_cbk, NULL,
                                     NULL, 0, NULL, 0, NULL,
                                     (xdrproc_t)xdr_gfx_open_req);
        if (ret) {
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");
        }

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
unwind:
        CLIENT_STACK_UNWIND (open, frame, -1, op_errno, NULL, NULL);

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
}


int32_t
client4_0_readv (call_frame_t *frame, xlator_t *this,
                 void *data)
{
        clnt_args_t    *args       = NULL;
        clnt_conf_t    *conf       = NULL;
        clnt_local_t   *local      = NULL;
        int             op_errno   = ESTALE;
        gfx_read_req   req        = {{0,},};
        int             ret        = 0;
        struct iovec    rsp_vec    = {0, };
        struct iobuf   *rsp_iobuf  = NULL;
        struct iobref  *rsp_iobref = NULL;

        if (!frame || !this || !data)
                goto unwind;

        args = data;
        conf = this->private;

        ret = client_pre_readv_v2 (this, &req, args->fd, args->size,
                                args->offset, args->flags, args->xdata);
        if (ret) {
                op_errno = -ret;
                goto unwind;
        }

        ret = client_fd_fop_prepare_local (frame, args->fd, req.fd);
        if (ret) {
                op_errno = -ret;
                goto unwind;
        }
        local = frame->local;

        rsp_iobuf = iobuf_get2 (this->ctx->iobuf_pool, args->size);
        if (rsp_iobuf == NULL) {
                op_errno = ENOMEM;
                goto unwind;
        }

        rsp_iobref = iobref_new ();
        if (rsp_iobref == NULL) {
                op_errno = ENOMEM;
                goto unwind;
        }

        iobref_add (rsp_iobref, rsp_iobuf);
        rsp_vec.iov_base = iobuf_ptr (rsp_iobuf);
        rsp_vec.iov_len = iobuf_pagesize (rsp_iobuf);
        local->iobref = rsp_iobref;
        iobuf_unref (rsp_iobuf);
        rsp_iobref = NULL;
        rsp_iobuf = NULL;

        if (args->size > rsp_vec.iov_len) {
                gf_msg (this->name, GF_LOG_WARNING, ENOMEM, PC_MSG_NO_MEMORY,
                        "read-size (%lu) is bigger than iobuf size (%lu)",
                        (unsigned long)args->size,
                        (unsigned long)rsp_vec.iov_len);
                op_errno = EINVAL;
                goto unwind;
        }


        ret = client_submit_request (this, &req, frame, conf->fops,
                                     GFS3_OP_READ, client4_0_readv_cbk, NULL,
                                     NULL, 0, &rsp_vec, 1,
                                     local->iobref,
                                     (xdrproc_t)xdr_gfx_read_req);
        if (ret) {
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");
        }

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
unwind:
        if (rsp_iobuf)
                iobuf_unref (rsp_iobuf);

        if (rsp_iobref)
                iobref_unref (rsp_iobref);

        CLIENT_STACK_UNWIND (readv, frame, -1, op_errno, NULL, 0, NULL, NULL, NULL);
        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
}


int32_t
client4_0_writev (call_frame_t *frame, xlator_t *this, void *data)
{
        clnt_args_t    *args     = NULL;
        clnt_conf_t    *conf     = NULL;
        gfx_write_req  req      = {{0,},};
        int             op_errno = ESTALE;
        int             ret      = 0;

        if (!frame || !this || !data)
                goto unwind;

        args = data;
        conf = this->private;

        ret = client_pre_writev_v2 (this, &req, args->fd, args->size,
                                 args->offset, args->flags, &args->xdata);

        if (ret) {
                op_errno = -ret;
                goto unwind;
        }

        ret = client_fd_fop_prepare_local (frame, args->fd, req.fd);
        if (ret) {
                op_errno = -ret;
                goto unwind;
        }

        ret = client_submit_request (this, &req, frame, conf->fops,
                                     GFS3_OP_WRITE, client4_0_writev_cbk,
                                     args->iobref, args->vector, args->count,
                                     NULL, 0, NULL,
                                     (xdrproc_t)xdr_gfx_write_req);
        if (ret) {
                /*
                 * If the lower layers fail to submit a request, they'll also
                 * do the unwind for us (see rpc_clnt_submit), so don't unwind
                 * here in such cases.
                 */
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");
        }

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;

unwind:
        CLIENT_STACK_UNWIND (writev, frame, -1, op_errno, NULL, NULL, NULL);
        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
}


int32_t
client4_0_flush (call_frame_t *frame, xlator_t *this,
                 void *data)
{
        clnt_args_t    *args     = NULL;
        gfx_flush_req  req      = {{0,},};
        clnt_conf_t    *conf     = NULL;
        clnt_local_t   *local    = NULL;
        int             op_errno = ESTALE;
        int             ret      = 0;

        if (!frame || !this || !data)
                goto unwind;

        args = data;
        conf = this->private;

        local = mem_get0 (this->local_pool);
        if (!local) {
                op_errno = ENOMEM;
                goto unwind;
        }

        frame->local = local;

        local->fd = fd_ref (args->fd);
        local->owner = frame->root->lk_owner;
        ret = client_pre_flush_v2 (this, &req, args->fd, args->xdata);
        if (ret) {
                op_errno = -ret;
                goto unwind;
        }
        ret = client_submit_request (this, &req, frame, conf->fops,
                                     GFS3_OP_FLUSH, client4_0_flush_cbk, NULL,
                                     NULL, 0, NULL, 0,
                                     NULL, (xdrproc_t)xdr_gfx_flush_req);
        if (ret) {
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");
        }

        GF_FREE (req.xdata.pairs.pairs_val);


        return 0;

unwind:
        CLIENT_STACK_UNWIND (flush, frame, -1, op_errno, NULL);
        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
}



int32_t
client4_0_fsync (call_frame_t *frame, xlator_t *this,
                 void *data)
{
        clnt_args_t    *args      = NULL;
        gfx_fsync_req  req       = {{0,},};
        clnt_conf_t    *conf      = NULL;
        int             op_errno  = 0;
        int             ret       = 0;

        if (!frame || !this || !data)
                goto unwind;

        args = data;
        conf = this->private;

        ret = client_pre_fsync_v2 (this, &req, args->fd, args->flags,
                                 args->xdata);
        if (ret) {
                op_errno = -ret;
                goto unwind;
        }
        ret = client_submit_request (this, &req, frame, conf->fops,
                                     GFS3_OP_FSYNC, client4_0_fsync_cbk, NULL,
                                     NULL, 0, NULL, 0,
                                     NULL, (xdrproc_t)xdr_gfx_fsync_req);
        if (ret) {
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");

        }

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;

unwind:
        CLIENT_STACK_UNWIND (fsync, frame, -1, op_errno, NULL, NULL, NULL);
        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
}



int32_t
client4_0_fstat (call_frame_t *frame, xlator_t *this,
                 void *data)
{
        clnt_args_t    *args     = NULL;
        gfx_fstat_req  req      = {{0,},};
        clnt_conf_t    *conf     = NULL;
        int             op_errno = ESTALE;
        int           ret        = 0;

        if (!frame || !this || !data)
                goto unwind;

        args = data;
        conf = this->private;

        ret = client_pre_fstat_v2 (this, &req, args->fd, args->xdata);

        if (ret) {
                op_errno = -ret;
                goto unwind;
        }

        ret = client_submit_request (this, &req, frame, conf->fops,
                                     GFS3_OP_FSTAT, client4_0_fstat_cbk, NULL,
                                     NULL, 0, NULL, 0,
                                     NULL, (xdrproc_t)xdr_gfx_fstat_req);
        if (ret) {
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");
        }

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;

unwind:
        CLIENT_STACK_UNWIND (fstat, frame, -1, op_errno, NULL, NULL);
        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
}



int32_t
client4_0_opendir (call_frame_t *frame, xlator_t *this,
                   void *data)
{
        clnt_local_t     *local    = NULL;
        clnt_conf_t      *conf     = NULL;
        clnt_args_t      *args     = NULL;
        gfx_opendir_req  req      = {{0,},};
        int               ret      = 0;
        int               op_errno = ESTALE;

        if (!frame || !this || !data)
                goto unwind;

        args = data;
        conf = this->private;

        local = mem_get0 (this->local_pool);
        if (!local) {
                op_errno = ENOMEM;
                goto unwind;
        }
        frame->local = local;

        local->fd = fd_ref (args->fd);
        loc_copy (&local->loc, args->loc);
        loc_path (&local->loc, NULL);

        ret = client_pre_opendir_v2 (this, &req, args->loc, args->fd,
                                  args->xdata);
        if (ret) {
                op_errno = -ret;
                goto unwind;
        }
        ret = client_submit_request (this, &req, frame, conf->fops,
                                     GFS3_OP_OPENDIR, client4_0_opendir_cbk,
                                     NULL, NULL, 0, NULL, 0, NULL,
                                     (xdrproc_t)xdr_gfx_opendir_req);
        if (ret) {
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");
        }

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;

unwind:
        CLIENT_STACK_UNWIND (opendir, frame, -1, op_errno, NULL, NULL);

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
}



int32_t
client4_0_fsyncdir (call_frame_t *frame, xlator_t *this, void *data)
{
        clnt_args_t       *args      = NULL;
        clnt_conf_t       *conf      = NULL;
        gfx_fsyncdir_req  req       = {{0,},};
        int                ret       = 0;
        int32_t            op_errno  = ESTALE;

        if (!frame || !this || !data)
                goto unwind;

        args = data;
        conf = this->private;

        ret = client_pre_fsyncdir_v2 (this, &req, args->fd, args->flags,
                                   args->xdata);
        if (ret) {
                op_errno = -ret;
                goto unwind;
        }
        ret = client_submit_request (this, &req, frame, conf->fops,
                                     GFS3_OP_FSYNCDIR, client4_0_fsyncdir_cbk,
                                     NULL, NULL, 0,
                                     NULL, 0, NULL,
                                     (xdrproc_t)xdr_gfx_fsyncdir_req);
        if (ret) {
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");
        }

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;

unwind:
        CLIENT_STACK_UNWIND (fsyncdir, frame, -1, op_errno, NULL);
        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
}



int32_t
client4_0_statfs (call_frame_t *frame, xlator_t *this,
                  void *data)
{
        clnt_conf_t     *conf     = NULL;
        clnt_args_t     *args     = NULL;
        gfx_statfs_req  req      = {{0,},};
        int              ret      = 0;
        int              op_errno = ESTALE;

        if (!frame || !this || !data)
                goto unwind;

        args = data;

        conf = this->private;

        ret = client_pre_statfs_v2 (this, &req, args->loc, args->xdata);
        if (ret) {
                op_errno = -ret;
                goto unwind;
        }
        ret = client_submit_request (this, &req, frame, conf->fops,
                                     GFS3_OP_STATFS, client4_0_statfs_cbk, NULL,
                                     NULL, 0, NULL, 0,
                                     NULL, (xdrproc_t)xdr_gfx_statfs_req);
        if (ret) {
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");
        }

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;

unwind:
        CLIENT_STACK_UNWIND (statfs, frame, -1, op_errno, NULL, NULL);
        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
}



int32_t
client4_0_setxattr (call_frame_t *frame, xlator_t *this,
                    void *data)
{
        clnt_conf_t       *conf     = NULL;
        clnt_args_t       *args     = NULL;
        gfx_setxattr_req  req      = {{0,},};
        int                ret      = 0;
        int                op_errno = ESTALE;

        if (!frame || !this || !data)
                goto unwind;

        args = data;
        conf = this->private;

        ret = client_pre_setxattr_v2 (this, &req, args->loc, args->xattr,
                                    args->flags, args->xdata);
        if (ret) {
                op_errno = -ret;
                goto unwind;
        }
        ret = client_submit_request (this, &req, frame, conf->fops,
                                     GFS3_OP_SETXATTR, client4_0_setxattr_cbk,
                                     NULL, NULL, 0, NULL, 0, NULL,
                                     (xdrproc_t)xdr_gfx_setxattr_req);
        if (ret) {
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");
        }
        GF_FREE (req.dict.pairs.pairs_val);

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
unwind:
        CLIENT_STACK_UNWIND (setxattr, frame, -1, op_errno, NULL);
        GF_FREE (req.dict.pairs.pairs_val);

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
}



int32_t
client4_0_fsetxattr (call_frame_t *frame, xlator_t *this,
                     void *data)
{
        clnt_args_t        *args     = NULL;
        clnt_conf_t        *conf     = NULL;
        gfx_fsetxattr_req  req      = {{0,},};
        int                 op_errno = ESTALE;
        int                 ret      = 0;

        if (!frame || !this || !data)
                goto unwind;

        args = data;
        conf = this->private;

        ret = client_pre_fsetxattr_v2 (this, &req, args->fd, args->flags,
                                     args->xattr, args->xdata);
        if (ret) {
                op_errno = -ret;
                goto unwind;
        }
        ret = client_submit_request (this, &req, frame, conf->fops,
                                     GFS3_OP_FSETXATTR, client4_0_fsetxattr_cbk,
                                     NULL, NULL, 0, NULL, 0, NULL,
                                     (xdrproc_t)xdr_gfx_fsetxattr_req);
        if (ret) {
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");
        }

        GF_FREE (req.dict.pairs.pairs_val);
        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
unwind:
        CLIENT_STACK_UNWIND (fsetxattr, frame, -1, op_errno, NULL);
        GF_FREE (req.dict.pairs.pairs_val);
        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
}

int32_t
client4_0_fgetxattr (call_frame_t *frame, xlator_t *this,
                     void *data)
{
        clnt_args_t        *args       = NULL;
        clnt_conf_t        *conf       = NULL;
        gfx_fgetxattr_req  req        = {{0,},};
        int                 op_errno   = ESTALE;
        int                 ret        = 0;
        clnt_local_t       *local      = NULL;

        if (!frame || !this || !data)
                goto unwind;

        args = data;
        conf = this->private;

        local = mem_get0 (this->local_pool);
        if (!local) {
                op_errno = ENOMEM;
                goto unwind;
        }
        frame->local = local;

        ret = client_pre_fgetxattr_v2 (this, &req, args->fd, args->name,
                                       args->xdata);
        if (ret) {
                op_errno = -ret;
                goto unwind;
        }
        ret = client_submit_request (this, &req, frame, conf->fops,
                                     GFS3_OP_FGETXATTR,
                                     client4_0_fgetxattr_cbk, NULL,
                                     NULL, 0, NULL, 0, NULL,
                                     (xdrproc_t)xdr_gfx_fgetxattr_req);
        if (ret) {
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");
        }

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
unwind:
        CLIENT_STACK_UNWIND (fgetxattr, frame, -1, op_errno, NULL, NULL);

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
}



int32_t
client4_0_getxattr (call_frame_t *frame, xlator_t *this,
                    void *data)
{
        clnt_conf_t       *conf       = NULL;
        clnt_args_t       *args       = NULL;
        gfx_getxattr_req  req        = {{0,},};
        dict_t            *dict       = NULL;
        int                ret        = 0;
        int32_t            op_ret     = -1;
        int                op_errno   = ESTALE;
        clnt_local_t      *local      = NULL;

        if (!frame || !this || !data) {
                op_errno = 0;
                goto unwind;
        }
        args = data;

        local = mem_get0 (this->local_pool);
        if (!local) {
                op_errno = ENOMEM;
                goto unwind;
        }

        frame->local = local;

        loc_copy (&local->loc, args->loc);
        loc_path (&local->loc, NULL);

        if (args->name)
                local->name = gf_strdup (args->name);

        conf = this->private;

        if (args && args->name) {
                if (is_client_dump_locks_cmd ((char *)args->name)) {
                        dict = dict_new ();

                        if (!dict) {
                                op_errno = ENOMEM;
                                goto unwind;
                        }

                        ret = client_dump_locks ((char *)args->name,
                                                 args->loc->inode,
                                                 dict);
                        if (ret) {
                                gf_msg (this->name, GF_LOG_WARNING, EINVAL,
                                        PC_MSG_INVALID_ENTRY, "Client dump "
                                        "locks failed");
                                op_errno = ENOMEM;
                                goto unwind;
                        }

                        GF_ASSERT (dict);
                        op_ret = 0;
                        op_errno = 0;
                        goto unwind;
                }
        }

        ret = client_pre_getxattr_v2 (this, &req, args->loc, args->name,
                                      args->xdata);
        if (ret) {
                op_errno = -ret;
                goto unwind;
        }
        ret = client_submit_request (this, &req, frame, conf->fops,
                                     GFS3_OP_GETXATTR,
                                     client4_0_getxattr_cbk, NULL,
                                     NULL, 0, NULL, 0, NULL,
                                     (xdrproc_t)xdr_gfx_getxattr_req);
        if (ret) {
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");
        }

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
unwind:
        CLIENT_STACK_UNWIND (getxattr, frame, op_ret, op_errno, dict, NULL);

        if (dict) {
                dict_unref(dict);
        }

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
}



int32_t
client4_0_xattrop (call_frame_t *frame, xlator_t *this,
                   void *data)
{
        clnt_conf_t      *conf       = NULL;
        clnt_args_t      *args       = NULL;
        gfx_xattrop_req  req        = {{0,},};
        int               ret        = 0;
        int               op_errno   = ESTALE;
        clnt_local_t   *local      = NULL;

        if (!frame || !this || !data)
                goto unwind;

        args = data;

        if (!(args->loc && args->loc->inode))
                goto unwind;

        local = mem_get0 (this->local_pool);
        if (!local) {
                op_errno = ENOMEM;
                goto unwind;
        }
        frame->local = local;

        loc_copy (&local->loc, args->loc);
        loc_path (&local->loc, NULL);
        conf = this->private;

        ret = client_pre_xattrop_v2 (this, &req, args->loc, args->xattr,
                                     args->flags, args->xdata);
        if (ret) {
                op_errno = -ret;
                goto unwind;
        }
        ret = client_submit_request (this, &req, frame, conf->fops,
                                     GFS3_OP_XATTROP,
                                     client4_0_xattrop_cbk, NULL,
                                     NULL, 0, NULL, 0, NULL,
                                     (xdrproc_t)xdr_gfx_xattrop_req);
        if (ret) {
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");
        }

        GF_FREE (req.dict.pairs.pairs_val);
        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
unwind:
        CLIENT_STACK_UNWIND (xattrop, frame, -1, op_errno, NULL, NULL);

        GF_FREE (req.dict.pairs.pairs_val);
        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
}



int32_t
client4_0_fxattrop (call_frame_t *frame, xlator_t *this,
                    void *data)
{
        clnt_args_t       *args       = NULL;
        clnt_conf_t       *conf       = NULL;
        gfx_fxattrop_req  req        = {{0,},};
        int                op_errno   = ESTALE;
        int                ret        = 0;

        if (!frame || !this || !data)
                goto unwind;

        args = data;
        conf = this->private;

        ret = client_pre_fxattrop_v2 (this, &req, args->fd, args->xattr,
                                   args->flags, args->xdata);
        if (ret) {
                op_errno = -ret;
                goto unwind;
        }
        ret = client_fd_fop_prepare_local (frame, args->fd, req.fd);
        if (ret) {
                op_errno = -ret;
                goto unwind;
        }

        ret = client_submit_request (this, &req, frame, conf->fops,
                                     GFS3_OP_FXATTROP,
                                     client4_0_fxattrop_cbk, NULL,
                                     NULL, 0, NULL, 0, NULL,
                                     (xdrproc_t)xdr_gfx_fxattrop_req);
        if (ret) {
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");
        }

        GF_FREE (req.dict.pairs.pairs_val);
        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
unwind:
        CLIENT_STACK_UNWIND (fxattrop, frame, -1, op_errno, NULL, NULL);

        GF_FREE (req.dict.pairs.pairs_val);
        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
}


int32_t
client4_0_removexattr (call_frame_t *frame, xlator_t *this,
                       void *data)
{
        clnt_conf_t          *conf     = NULL;
        clnt_args_t          *args     = NULL;
        gfx_removexattr_req  req      = {{0,},};
        int                   ret      = 0;
        int                   op_errno = ESTALE;

        if (!frame || !this || !data)
                goto unwind;

        args = data;
        conf = this->private;

        ret = client_pre_removexattr_v2 (this, &req, args->loc, args->name,
                                       args->xdata);
        if (ret) {
                op_errno = -ret;
                goto unwind;
        }
        ret = client_submit_request (this, &req, frame, conf->fops,
                                     GFS3_OP_REMOVEXATTR,
                                     client4_0_removexattr_cbk, NULL,
                                     NULL, 0, NULL, 0, NULL,
                                     (xdrproc_t)xdr_gfx_removexattr_req);
        if (ret) {
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");
        }

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
unwind:
        CLIENT_STACK_UNWIND (removexattr, frame, -1, op_errno, NULL);
        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
}

int32_t
client4_0_fremovexattr (call_frame_t *frame, xlator_t *this,
                        void *data)
{
        clnt_conf_t           *conf     = NULL;
        clnt_args_t           *args     = NULL;
        gfx_fremovexattr_req  req      = {{0,},};
        int                    ret      = 0;
        int                    op_errno = ESTALE;

        if (!frame || !this || !data)
                goto unwind;

        args = data;

        conf = this->private;

        ret = client_pre_fremovexattr_v2 (this, &req, args->fd, args->name,
                                        args->xdata);
        if (ret) {
                op_errno = -ret;
                goto unwind;
        }
        ret = client_submit_request (this, &req, frame, conf->fops,
                                     GFS3_OP_FREMOVEXATTR,
                                     client4_0_fremovexattr_cbk, NULL,
                                     NULL, 0, NULL, 0, NULL,
                                     (xdrproc_t)xdr_gfx_fremovexattr_req);
        if (ret) {
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");
        }

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
unwind:
        CLIENT_STACK_UNWIND (fremovexattr, frame, -1, op_errno, NULL);
        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
}

int32_t
client4_0_lease (call_frame_t *frame, xlator_t *this,
                 void *data)
{
        clnt_args_t     *args       = NULL;
        gfx_lease_req   req        = {{0,},};
        clnt_conf_t     *conf       = NULL;
        int              op_errno   = ESTALE;
        int              ret        = 0;

        GF_VALIDATE_OR_GOTO ("client", this, unwind);
        GF_VALIDATE_OR_GOTO (this->name, frame, unwind);
        GF_VALIDATE_OR_GOTO (this->name, data, unwind);

        args = data;
        conf = this->private;

        ret = client_pre_lease_v2 (this, &req, args->loc, args->lease,
                                args->xdata);
        if (ret < 0) {
                op_errno = -ret;
                goto unwind;
        }
        ret = client_submit_request (this, &req, frame, conf->fops, GFS3_OP_LEASE,
                                     client4_0_lease_cbk, NULL,
                                     NULL, 0, NULL, 0, NULL,
                                     (xdrproc_t)xdr_gfx_lease_req);
        if (ret) {
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");
        }

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
unwind:
        CLIENT_STACK_UNWIND (lease, frame, -1, op_errno, NULL, NULL);
        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
}

int32_t
client4_0_lk (call_frame_t *frame, xlator_t *this,
              void *data)
{
        clnt_args_t     *args       = NULL;
        gfx_lk_req      req        = {{0,},};
        int32_t          gf_cmd     = 0;
        clnt_local_t    *local      = NULL;
        clnt_conf_t     *conf       = NULL;
        int              op_errno   = ESTALE;
        int              ret        = 0;

        if (!frame || !this || !data)
                goto unwind;

        args = data;
        conf = this->private;
        local = mem_get0 (this->local_pool);
        if (!local) {
                op_errno = ENOMEM;
                goto unwind;
        }
        frame->local = local;

        ret = client_cmd_to_gf_cmd (args->cmd, &gf_cmd);
        if (ret) {
                op_errno = EINVAL;
                gf_msg (this->name, GF_LOG_WARNING, EINVAL,
                        PC_MSG_INVALID_ENTRY, "Unknown cmd (%d)!", gf_cmd);
                goto unwind;
        }

        local->owner = frame->root->lk_owner;
        local->cmd   = args->cmd;
        local->fd    = fd_ref (args->fd);

        ret = client_pre_lk_v2 (this, &req, args->cmd, args->flock,
                             args->fd, args->xdata);
        if (ret) {
                op_errno = -ret;
                goto unwind;
        }
        ret = client_submit_request (this, &req, frame, conf->fops, GFS3_OP_LK,
                                     client4_0_lk_cbk, NULL,
                                     NULL, 0, NULL, 0, NULL,
                                     (xdrproc_t)xdr_gfx_lk_req);
        if (ret) {
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");
        }

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
unwind:
        CLIENT_STACK_UNWIND (lk, frame, -1, op_errno, NULL, NULL);
        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
}


int32_t
client4_0_inodelk (call_frame_t *frame, xlator_t *this,
                   void *data)
{
        clnt_conf_t      *conf     = NULL;
        clnt_args_t      *args    = NULL;
        gfx_inodelk_req  req     = {{0,},};
        int               ret     = 0;
        int               op_errno = ESTALE;

        if (!frame || !this || !data)
                goto unwind;

        args = data;
        conf = this->private;

        ret = client_pre_inodelk_v2 (this, &req, args->loc, args->cmd,
                                   args->flock, args->volume, args->xdata);
        if (ret) {
                op_errno = -ret;
                goto unwind;
        }
        ret = client_submit_request (this, &req, frame, conf->fops,
                                     GFS3_OP_INODELK,
                                     client4_0_inodelk_cbk, NULL,
                                     NULL, 0, NULL, 0,
                                     NULL, (xdrproc_t)xdr_gfx_inodelk_req);
        if (ret) {
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");
        }

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
unwind:
        CLIENT_STACK_UNWIND (inodelk, frame, -1, op_errno, NULL);
        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
}



int32_t
client4_0_finodelk (call_frame_t *frame, xlator_t *this,
                    void *data)
{
        clnt_args_t       *args     = NULL;
        gfx_finodelk_req  req      = {{0,},};
        clnt_conf_t       *conf     = NULL;
        int                op_errno = ESTALE;
        int                ret      = 0;

        if (!frame || !this || !data)
                goto unwind;

        args = data;
        conf = this->private;

        ret = client_pre_finodelk_v2 (this, &req, args->fd,
                                    args->cmd, args->flock, args->volume,
                                    args->xdata);
        if (ret) {
                op_errno = -ret;
                goto unwind;
        }

        ret = client_fd_fop_prepare_local (frame, args->fd, req.fd);
        if (ret) {
                op_errno = -ret;
                goto unwind;
        }

        ret = client_submit_request (this, &req, frame, conf->fops,
                                     GFS3_OP_FINODELK,
                                     client4_0_finodelk_cbk, NULL,
                                     NULL, 0, NULL, 0,
                                     NULL, (xdrproc_t)xdr_gfx_finodelk_req);
        if (ret) {
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");
        }

        GF_FREE (req.xdata.pairs.pairs_val);
        return 0;
unwind:
        CLIENT_STACK_UNWIND (finodelk, frame, -1, op_errno, NULL);
        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
}


int32_t
client4_0_entrylk (call_frame_t *frame, xlator_t *this,
                   void *data)
{
        clnt_conf_t      *conf     = NULL;
        clnt_args_t      *args     = NULL;
        gfx_entrylk_req  req      = {{0,},};
        int               ret      = 0;
        int               op_errno = ESTALE;

        if (!frame || !this || !data)
                goto unwind;

        args = data;

        conf = this->private;

        ret = client_pre_entrylk_v2 (this, &req, args->loc, args->cmd_entrylk,
                                   args->type, args->volume, args->basename,
                                   args->xdata);
        if (ret) {
                op_errno = -ret;
                goto unwind;
        }

        ret = client_submit_request (this, &req, frame, conf->fops,
                                     GFS3_OP_ENTRYLK,
                                     client4_0_entrylk_cbk, NULL,
                                     NULL, 0, NULL, 0,
                                     NULL, (xdrproc_t)xdr_gfx_entrylk_req);
        if (ret) {
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");
        }

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
unwind:
        CLIENT_STACK_UNWIND (entrylk, frame, -1, op_errno, NULL);
        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
}



int32_t
client4_0_fentrylk (call_frame_t *frame, xlator_t *this,
                    void *data)
{
        clnt_args_t       *args     = NULL;
        gfx_fentrylk_req  req      = {{0,},};
        clnt_conf_t       *conf     = NULL;
        int                op_errno = ESTALE;
        int           ret        = 0;

        if (!frame || !this || !data)
                goto unwind;

        args = data;
        conf = this->private;

        ret = client_pre_fentrylk_v2 (this, &req, args->fd, args->cmd_entrylk,
                                    args->type, args->volume, args->basename,
                                    args->xdata);
        if (ret) {
                op_errno = -ret;
                goto unwind;
        }
        ret = client_submit_request (this, &req, frame, conf->fops,
                                     GFS3_OP_FENTRYLK,
                                     client4_0_fentrylk_cbk, NULL,
                                     NULL, 0, NULL, 0,
                                     NULL, (xdrproc_t)xdr_gfx_fentrylk_req);
        if (ret) {
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");
        }

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
unwind:
        CLIENT_STACK_UNWIND (fentrylk, frame, -1, op_errno, NULL);
        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
}


int32_t
client4_0_readdir (call_frame_t *frame, xlator_t *this,
                   void *data)
{
        clnt_args_t      *args       = NULL;
        int64_t           remote_fd  = -1;
        clnt_conf_t      *conf       = NULL;
        gfx_readdir_req  req        = {{0,},};
        gfx_readdir_rsp  rsp        = {0, };
        clnt_local_t     *local      = NULL;
        int               op_errno   = ESTALE;
        int               ret        = 0;
        int               count      = 0;
        struct iobref    *rsp_iobref = NULL;
        struct iobuf     *rsp_iobuf  = NULL;
        struct iovec     *rsphdr     = NULL;
        struct iovec      vector[MAX_IOVEC] = {{0}, };
        int               readdir_rsp_size  = 0;

        if (!frame || !this || !data)
                goto unwind;

        args = data;
        conf = this->private;

        readdir_rsp_size = xdr_sizeof ((xdrproc_t) xdr_gfx_readdir_rsp, &rsp)
                + args->size;

        local = mem_get0 (this->local_pool);
        if (!local) {
                op_errno = ENOMEM;
                goto unwind;
        }
        frame->local = local;

        local->cmd = remote_fd;

        if ((readdir_rsp_size + GLUSTERFS_RPC_REPLY_SIZE + GLUSTERFS_RDMA_MAX_HEADER_SIZE)
            > (GLUSTERFS_RDMA_INLINE_THRESHOLD)) {
                rsp_iobref = iobref_new ();
                if (rsp_iobref == NULL) {
                        goto unwind;
                }

                /* TODO: what is the size we should send ? */
                /* This iobuf will live for only receiving the response,
                   so not harmful */
                rsp_iobuf = iobuf_get (this->ctx->iobuf_pool);
                if (rsp_iobuf == NULL) {
                        goto unwind;
                }

                iobref_add (rsp_iobref, rsp_iobuf);

                rsphdr = &vector[0];
                rsphdr->iov_base = iobuf_ptr (rsp_iobuf);
                rsphdr->iov_len  = iobuf_pagesize (rsp_iobuf);
                count = 1;
                local->iobref = rsp_iobref;
                iobuf_unref (rsp_iobuf);
                rsp_iobuf = NULL;
                rsp_iobref = NULL;
        }

        ret = client_pre_readdir_v2 (this, &req, args->fd, args->size,
                                  args->offset, args->xdata);
        if (ret) {
                op_errno = -ret;
                goto unwind;
        }

        ret = client_submit_request (this, &req, frame, conf->fops,
                                     GFS3_OP_READDIR,
                                     client4_0_readdir_cbk, NULL,
                                     rsphdr, count,
                                     NULL, 0, rsp_iobref,
                                     (xdrproc_t)xdr_gfx_readdir_req);

        if (ret) {
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");
        }

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;

unwind:
        if (rsp_iobref)
                iobref_unref (rsp_iobref);

        CLIENT_STACK_UNWIND (readdir, frame, -1, op_errno, NULL, NULL);
        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
}


int32_t
client4_0_readdirp (call_frame_t *frame, xlator_t *this,
                    void *data)
{
        clnt_args_t      *args              = NULL;
        gfx_readdirp_req req               = {{0,},};
        gfx_readdirp_rsp rsp               = {0,};
        clnt_conf_t      *conf              = NULL;
        int               op_errno          = ESTALE;
        int               ret               = 0;
        int               count             = 0;
        int               readdirp_rsp_size = 0;
        struct iobref    *rsp_iobref        = NULL;
        struct iobuf     *rsp_iobuf         = NULL;
        struct iovec     *rsphdr            = NULL;
        struct iovec      vector[MAX_IOVEC] = {{0}, };
        clnt_local_t     *local             = NULL;

        if (!frame || !this || !data)
                goto unwind;

        args = data;
        conf = this->private;

        local = mem_get0 (this->local_pool);
        if (!local) {
                op_errno = ENOMEM;
                goto unwind;
        }
        frame->local = local;

        ret = client_pre_readdirp_v2 (this, &req, args->fd, args->size,
                                   args->offset, args->xdata);

        if (ret) {
                op_errno = -ret;
                goto unwind;
        }

        readdirp_rsp_size = xdr_sizeof ((xdrproc_t) xdr_gfx_readdirp_rsp, &rsp)
                + args->size;

        if ((readdirp_rsp_size + GLUSTERFS_RPC_REPLY_SIZE
             + GLUSTERFS_RDMA_MAX_HEADER_SIZE)
            > (GLUSTERFS_RDMA_INLINE_THRESHOLD)) {
                rsp_iobref = iobref_new ();
                if (rsp_iobref == NULL) {
                        goto unwind;
                }

                /* TODO: what is the size we should send ? */
                /* This iobuf will live for only receiving the response,
                   so not harmful */
                rsp_iobuf = iobuf_get (this->ctx->iobuf_pool);
                if (rsp_iobuf == NULL) {
                        goto unwind;
                }

                iobref_add (rsp_iobref, rsp_iobuf);
                iobuf_unref (rsp_iobuf);

                rsphdr = &vector[0];
                rsphdr->iov_base = iobuf_ptr (rsp_iobuf);
                rsphdr->iov_len  = iobuf_pagesize (rsp_iobuf);
                count = 1;
                local->iobref = rsp_iobref;
                rsp_iobuf = NULL;
                rsp_iobref = NULL;
        }

        local->fd = fd_ref (args->fd);

        ret = client_submit_request (this, &req, frame, conf->fops,
                                     GFS3_OP_READDIRP,
                                     client4_0_readdirp_cbk, NULL,
                                     rsphdr, count, NULL,
                                     0, rsp_iobref,
                                     (xdrproc_t)xdr_gfx_readdirp_req);
        if (ret) {
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");
        }

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
unwind:
        if (rsp_iobref)
                iobref_unref (rsp_iobref);

        GF_FREE (req.xdata.pairs.pairs_val);

        CLIENT_STACK_UNWIND (readdirp, frame, -1, op_errno, NULL, NULL);
        return 0;
}


int32_t
client4_0_setattr (call_frame_t *frame, xlator_t *this,
                   void *data)
{
        clnt_conf_t      *conf     = NULL;
        clnt_args_t      *args     = NULL;
        gfx_setattr_req  req      = {{0,},};
        int               ret      = 0;
        int               op_errno = ESTALE;

        if (!frame || !this || !data)
                goto unwind;

        args = data;
        conf = this->private;

        ret = client_pre_setattr_v2 (this, &req, args->loc, args->valid,
                                  args->stbuf, args->xdata);

        if (ret) {
                op_errno = -ret;
                goto unwind;
        }

        ret = client_submit_request (this, &req, frame, conf->fops,
                                     GFS3_OP_SETATTR,
                                     client4_0_setattr_cbk, NULL,
                                     NULL, 0, NULL, 0,
                                     NULL, (xdrproc_t)xdr_gfx_setattr_req);
        if (ret) {
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");
        }

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
unwind:
        CLIENT_STACK_UNWIND (setattr, frame, -1, op_errno, NULL, NULL, NULL);
        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
}

int32_t
client4_0_fallocate(call_frame_t *frame, xlator_t *this, void *data)
{
        clnt_args_t       *args     = NULL;
        clnt_conf_t       *conf     = NULL;
        gfx_fallocate_req req       = {{0},};
        int                op_errno = ESTALE;
        int                ret        = 0;

        if (!frame || !this || !data)
                goto unwind;

        args = data;
        conf = this->private;

        ret = client_pre_fallocate_v2 (this, &req, args->fd, args->flags,
                                     args->offset, args->size, args->xdata);
        if (ret) {
                op_errno = -ret;
                goto unwind;
        }

        ret = client_submit_request (this, &req, frame, conf->fops,
                                     GFS3_OP_FALLOCATE,
                                     client4_0_fallocate_cbk, NULL,
                                     NULL, 0, NULL, 0,
                                     NULL, (xdrproc_t)xdr_gfx_fallocate_req);
        if (ret) {
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");
        }

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
unwind:
        CLIENT_STACK_UNWIND (fallocate, frame, -1, op_errno, NULL, NULL, NULL);
        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
}

int32_t
client4_0_discard(call_frame_t *frame, xlator_t *this, void *data)
{
        clnt_args_t       *args     = NULL;
        clnt_conf_t       *conf     = NULL;
        gfx_discard_req   req       = {{0},};
        int                op_errno = ESTALE;
        int                ret        = 0;

        if (!frame || !this || !data)
                goto unwind;

        args = data;
        conf = this->private;

        ret = client_pre_discard_v2 (this, &req, args->fd, args->offset,
                                  args->size, args->xdata);
        if (ret) {
                op_errno = -ret;
                goto unwind;
        }


        ret = client_submit_request(this, &req, frame, conf->fops,
                                    GFS3_OP_DISCARD, client4_0_discard_cbk,
                                    NULL, NULL, 0, NULL, 0, NULL,
                                    (xdrproc_t) xdr_gfx_discard_req);
        if (ret)
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
unwind:
        CLIENT_STACK_UNWIND(discard, frame, -1, op_errno, NULL, NULL, NULL);
        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
}

int32_t
client4_0_zerofill(call_frame_t *frame, xlator_t *this, void *data)
{
        clnt_args_t       *args        = NULL;
        clnt_conf_t       *conf        = NULL;
        gfx_zerofill_req   req        = {{0},};
        int                op_errno    = ESTALE;
        int                ret         = 0;

        GF_ASSERT (frame);

        if (!this || !data)
                goto unwind;

        args = data;
        conf = this->private;

        ret = client_pre_zerofill_v2 (this, &req, args->fd, args->offset,
                                   args->size, args->xdata);
        if (ret) {
                op_errno = -ret;
                goto unwind;
        }

        ret = client_submit_request(this, &req, frame, conf->fops,
                                    GFS3_OP_ZEROFILL, client4_0_zerofill_cbk,
                                    NULL, NULL, 0, NULL, 0, NULL,
                                    (xdrproc_t) xdr_gfx_zerofill_req);
        if (ret)
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
unwind:
        CLIENT_STACK_UNWIND(zerofill, frame, -1, op_errno, NULL, NULL, NULL);
        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
}

int32_t
client4_0_ipc (call_frame_t *frame, xlator_t *this, void *data)
{
        clnt_args_t       *args        = NULL;
        clnt_conf_t       *conf        = NULL;
        gfx_ipc_req       req        = {0,};
        int                op_errno    = ESTALE;
        int                ret         = 0;

        GF_ASSERT (frame);

        if (!this || !data)
                goto unwind;

        args = data;
        conf = this->private;

        ret = client_pre_ipc_v2 (this, &req, args->cmd, args->xdata);

        if (ret) {
                op_errno = -ret;
                goto unwind;
        }

        ret = client_submit_request(this, &req, frame, conf->fops,
                                    GFS3_OP_IPC, client4_0_ipc_cbk,
                                    NULL, NULL, 0, NULL, 0, NULL,
                                    (xdrproc_t) xdr_gfx_ipc_req);
        if (ret)
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
unwind:
        CLIENT_STACK_UNWIND(ipc, frame, -1, op_errno, NULL);
        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
}

int32_t
client4_0_seek (call_frame_t *frame, xlator_t *this, void *data)
{
        clnt_args_t            *args        = NULL;
        clnt_conf_t            *conf        = NULL;
        struct gfx_seek_req    req         = {{0,},};
        int                     op_errno    = ESTALE;
        int                     ret         = 0;

        GF_ASSERT (frame);

        if (!this || !data)
                goto unwind;

        args = data;
        conf = this->private;

        ret = client_pre_seek_v2 (this, &req, args->fd,
                                  args->offset, args->what, args->xdata);
        if (ret) {
                op_errno = -ret;
                goto unwind;
        }

        ret = client_submit_request(this, &req, frame, conf->fops,
                                    GFS3_OP_SEEK, client4_0_seek_cbk,
                                    NULL, NULL, 0, NULL, 0, NULL,
                                    (xdrproc_t) xdr_gfx_seek_req);
        if (ret)
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
unwind:
        CLIENT_STACK_UNWIND(ipc, frame, -1, op_errno, NULL);
        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
}


int32_t
client4_0_getactivelk (call_frame_t *frame, xlator_t *this,
                        void *data)
{
        clnt_conf_t   *conf             = NULL;
        clnt_args_t   *args             = NULL;
        gfx_getactivelk_req  req      = {{0,},};
        int            ret              = 0;
        int            op_errno         = ESTALE;

        if (!frame || !this || !data)
                goto unwind;

        args = data;
        if (!(args->loc && args->loc->inode))
                goto unwind;

        if (!gf_uuid_is_null (args->loc->inode->gfid))
                memcpy (req.gfid,  args->loc->inode->gfid, 16);
        else
                memcpy (req.gfid, args->loc->gfid, 16);

        GF_ASSERT_AND_GOTO_WITH_ERROR (this->name,
                                       !gf_uuid_is_null (*((uuid_t *)req.gfid)),
                                       unwind, op_errno, EINVAL);
        conf = this->private;

        dict_to_xdr (args->xdata, &req.xdata);

        ret = client_submit_request (this, &req, frame, conf->fops,
                                     GFS3_OP_GETACTIVELK,
                                     client4_0_getactivelk_cbk, NULL,
                                     NULL, 0, NULL, 0, NULL,
                                     (xdrproc_t)xdr_gfx_getactivelk_req);
        if (ret) {
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");
        }

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
unwind:
        CLIENT_STACK_UNWIND (getactivelk, frame, -1, op_errno, NULL, NULL);

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
}

int32_t
client4_0_setactivelk (call_frame_t *frame, xlator_t *this,
                        void *data)
{
        clnt_conf_t   *conf             = NULL;
        clnt_args_t   *args             = NULL;
        gfx_setactivelk_req  req      = {{0,},};
        int            ret              = 0;
        int            op_errno         = ESTALE;

        if (!frame || !this || !data)
                goto unwind;

        args = data;
        if (!(args->loc && args->loc->inode && args->locklist))
                goto unwind;

        if (!gf_uuid_is_null (args->loc->inode->gfid))
                memcpy (req.gfid,  args->loc->inode->gfid, 16);
        else
                memcpy (req.gfid, args->loc->gfid, 16);

        GF_ASSERT_AND_GOTO_WITH_ERROR (this->name,
                                       !gf_uuid_is_null (*((uuid_t *)req.gfid)),
                                       unwind, op_errno, EINVAL);
        conf = this->private;

        dict_to_xdr (args->xdata, &req.xdata);
        ret = serialize_req_locklist_v2 (args->locklist, &req);

        if (ret)
                goto unwind;

        ret = client_submit_request (this, &req, frame, conf->fops,
                                     GFS3_OP_SETACTIVELK, client4_0_setactivelk_cbk, NULL,
                                     NULL, 0, NULL, 0, NULL,
                                     (xdrproc_t)xdr_gfx_setactivelk_req);
        if (ret) {
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");
        }


        clnt_setactivelk_req_cleanup_v2 (&req);

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;

unwind:

        CLIENT_STACK_UNWIND (setactivelk, frame, -1, op_errno, NULL);

        GF_FREE (req.xdata.pairs.pairs_val);

        clnt_setactivelk_req_cleanup_v2 (&req);

        return 0;
}


int
client4_rchecksum_cbk (struct rpc_req *req, struct iovec *iov, int count,
                         void *myframe)
{
        call_frame_t *frame = NULL;
        gfx_rchecksum_rsp rsp        = {0,};
        int               ret        = 0;
        xlator_t *this       = NULL;
        dict_t  *xdata       = NULL;

        this = THIS;

        frame = myframe;

        if (-1 == req->rpc_status) {
                rsp.op_ret   = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }

        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_rchecksum_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }

        xdr_to_dict (&rsp.xdata, &xdata);
out:
        if (rsp.op_ret == -1) {
                gf_msg (this->name, GF_LOG_WARNING,
                        gf_error_to_errno (rsp.op_errno),
                        PC_MSG_REMOTE_OP_FAILED,
                        "remote operation failed");
        }

        CLIENT_STACK_UNWIND (rchecksum, frame, rsp.op_ret,
                             gf_error_to_errno (rsp.op_errno),
                             rsp.weak_checksum,
                             (uint8_t *)rsp.strong_checksum.strong_checksum_val,
                             xdata);

        if (rsp.strong_checksum.strong_checksum_val) {
                /* This is allocated by the libc while decoding RPC msg */
                /* Hence no 'GF_FREE', but just 'free' */
                free (rsp.strong_checksum.strong_checksum_val);
        }

        if (xdata)
                dict_unref (xdata);

        return 0;
}


int32_t
client4_namelink_cbk (struct rpc_req *req,
                      struct iovec *iov, int count, void *myframe)
{
        int32_t            ret     = 0;
        struct iatt        prebuf  = {0,};
        struct iatt        postbuf = {0,};
        dict_t            *xdata   = NULL;
        call_frame_t      *frame   = NULL;
        gfx_common_2iatt_rsp   rsp     = {0,};

        frame = myframe;

        if (req->rpc_status == -1) {
                rsp.op_ret = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }

        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_common_2iatt_rsp);
        if (ret < 0) {
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }

        if (rsp.op_ret != -1) {
                gfx_stat_to_iattx (&rsp.prestat, &prebuf);
                gfx_stat_to_iattx (&rsp.poststat, &postbuf);
        }

        xdr_to_dict (&rsp.xdata, &xdata);
 out:
        CLIENT_STACK_UNWIND (namelink, frame, rsp.op_ret,
                             gf_error_to_errno (rsp.op_errno),
                             &prebuf, &postbuf, xdata);
        if (xdata)
                dict_unref (xdata);
        return 0;
}

int32_t
client4_icreate_cbk (struct rpc_req *req,
                     struct iovec *iov, int count, void *myframe)
{
        int32_t           ret      = 0;
        inode_t          *inode    = NULL;
        clnt_local_t     *local    = NULL;
        struct iatt       stbuf    = {0,};
        dict_t           *xdata    = NULL;
        call_frame_t     *frame    = NULL;
        gfx_common_iatt_rsp   rsp      = {0,};

        frame = myframe;
        local = frame->local;

        inode = local->loc.inode;

        if (req->rpc_status == -1) {
                rsp.op_ret = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }

        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_common_iatt_rsp);
        if (ret < 0) {
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }

        if (rsp.op_ret != -1)
                gfx_stat_to_iattx (&rsp.stat, &stbuf);

        xdr_to_dict (&rsp.xdata, &xdata);
 out:
        CLIENT_STACK_UNWIND (icreate, frame, rsp.op_ret,
                             gf_error_to_errno (rsp.op_errno),
                             inode, &stbuf, xdata);
        if (xdata)
                dict_unref (xdata);
        return 0;
}

int
client4_0_put_cbk (struct rpc_req *req, struct iovec *iov, int count,
                   void *myframe)
{
        gfx_common_3iatt_rsp  rsp        = {0,};
        call_frame_t         *frame      = NULL;
        int                   ret        = 0;
        xlator_t             *this       = NULL;
        dict_t               *xdata      = NULL;
        clnt_local_t         *local      = NULL;
        struct iatt           stbuf      = {0, };
        struct iatt           preparent  = {0, };
        struct iatt           postparent = {0, };
        inode_t              *inode      = NULL;

        this = THIS;

        frame = myframe;
        local = frame->local;
        inode = local->loc.inode;

        if (-1 == req->rpc_status) {
                rsp.op_ret   = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }

        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_common_3iatt_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }


        if (-1 != rsp.op_ret) {
                ret = client_post_common_3iatt (this, &rsp, &stbuf, &preparent,
                                                &postparent, &xdata);
                if (ret < 0)
                        goto out;
        }
out:
        if (rsp.op_ret == -1) {
                gf_msg (this->name, GF_LOG_WARNING,
                        gf_error_to_errno (rsp.op_errno),
                        PC_MSG_REMOTE_OP_FAILED,
                        "remote operation failed");
        }

        CLIENT_STACK_UNWIND (put, frame, rsp.op_ret,
                             gf_error_to_errno (rsp.op_errno), inode, &stbuf,
                             &preparent, &postparent, xdata);

        if (xdata)
                dict_unref (xdata);

        return 0;
}

int32_t
client4_0_namelink (call_frame_t *frame, xlator_t *this, void *data)
{
        int32_t ret = 0;
        int32_t op_errno = EINVAL;
        clnt_conf_t *conf = NULL;
        clnt_args_t *args = NULL;
        gfx_namelink_req req = {{0,},};

        GF_ASSERT (frame);

        args = data;
        conf = this->private;

        if (!(args->loc && args->loc->parent))
                goto unwind;

        if (!gf_uuid_is_null (args->loc->parent->gfid))
                memcpy (req.pargfid, args->loc->parent->gfid, sizeof (uuid_t));
        else
                memcpy (req.pargfid, args->loc->pargfid, sizeof (uuid_t));

        GF_ASSERT_AND_GOTO_WITH_ERROR (this->name,
                                       !gf_uuid_is_null (*((uuid_t *)req.pargfid)),
                                       unwind, op_errno, EINVAL);

        req.bname = (char *)args->loc->name;

        dict_to_xdr (args->xdata, &req.xdata);
        ret = client_submit_request (this, &req, frame, conf->fops,
                                     GFS3_OP_NAMELINK, client4_namelink_cbk,
                                     NULL, NULL, 0, NULL, 0, NULL,
                                     (xdrproc_t)xdr_gfx_namelink_req);
        if (ret) {
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");
        }

        GF_FREE (req.xdata.pairs.pairs_val);
        return 0;

 unwind:
        CLIENT_STACK_UNWIND (namelink, frame, -1, op_errno, NULL, NULL, NULL);
        return 0;
}

int32_t
client4_0_icreate (call_frame_t *frame, xlator_t *this, void *data)
{
        int32_t ret = 0;
        int32_t op_errno = EINVAL;
        clnt_conf_t *conf = NULL;
        clnt_args_t *args = NULL;
        clnt_local_t *local = NULL;
        gfx_icreate_req req = {{0,},};

        GF_ASSERT (frame);

        args = data;
        conf = this->private;

        if (!(args->loc && args->loc->inode))
                goto unwind;

        local = mem_get0 (this->local_pool);
        if (!local) {
                op_errno = ENOMEM;
                goto unwind;
        }
        frame->local = local;

        loc_copy (&local->loc, args->loc);

        req.mode = args->mode;
        memcpy (req.gfid, args->loc->gfid, sizeof (uuid_t));

        op_errno = ESTALE;
        dict_to_xdr (args->xdata, &req.xdata);
        ret = client_submit_request (this, &req, frame, conf->fops,
                                     GFS3_OP_ICREATE, client4_icreate_cbk,
                                     NULL, NULL, 0, NULL, 0, NULL,
                                     (xdrproc_t) xdr_gfx_icreate_req);
        if (ret)
                goto free_reqdata;
        GF_FREE (req.xdata.pairs.pairs_val);
        return 0;

 free_reqdata:
        GF_FREE (req.xdata.pairs.pairs_val);
 unwind:
        CLIENT_STACK_UNWIND (icreate, frame,
                             -1, op_errno, NULL, NULL, NULL);
        return 0;
}


int32_t
client4_0_put (call_frame_t *frame, xlator_t *this, void *data)
{
        clnt_args_t    *args     = NULL;
        clnt_conf_t    *conf     = NULL;
        gfx_put_req     req      = {{0,},};
        int             op_errno = ESTALE;
        int             ret      = 0;
        clnt_local_t   *local    = NULL;

        if (!frame || !this || !data)
                goto unwind;

        args = data;
        conf = this->private;

        local = mem_get0 (this->local_pool);
        if (!local) {
                op_errno = ENOMEM;
                goto unwind;
        }
        frame->local = local;

        loc_copy (&local->loc, args->loc);
        loc_path (&local->loc, NULL);

        ret = client_pre_put_v2 (this, &req, args->loc, args->mode, args->umask,
                                 args->flags, args->size, args->offset,
                                 args->xattr, args->xdata);

        if (ret) {
                op_errno = -ret;
                goto unwind;
        }

        ret = client_submit_request (this, &req, frame, conf->fops,
                                     GFS3_OP_PUT, client4_0_put_cbk,
                                     args->iobref, args->vector, args->count,
                                     NULL, 0, NULL,
                                     (xdrproc_t)xdr_gfx_put_req);
        if (ret) {
                /*
                 * If the lower layers fail to submit a request, they'll also
                 * do the unwind for us (see rpc_clnt_submit), so don't unwind
                 * here in such cases.
                 */
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");
        }

        return 0;

unwind:
        CLIENT_STACK_UNWIND (put, frame, -1, op_errno, NULL, NULL, NULL, NULL,
                             NULL);
        return 0;
}

int32_t
client4_0_fsetattr (call_frame_t *frame, xlator_t *this, void *data)
{
        clnt_args_t          *args      = NULL;
        clnt_conf_t          *conf      = NULL;
        gfx_fsetattr_req      req       = {{0},};
        int                   op_errno  = ESTALE;
        int                   ret       = 0;

        if (!frame || !this || !data)
                goto unwind;

        args = data;
        conf = this->private;

        ret = client_pre_fsetattr_v2 (this, &req, args->fd, args->valid,
                                      args->stbuf, args->xdata);
        if (ret) {
                op_errno = -ret;
                goto unwind;
        }
        ret = client_submit_request (this, &req, frame, conf->fops,
                                     GFS3_OP_FSETATTR,
                                     client4_0_fsetattr_cbk, NULL,
                                     NULL, 0, NULL, 0,
                                     NULL, (xdrproc_t)xdr_gfx_fsetattr_req);
        if (ret) {
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");
        }

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
unwind:
        CLIENT_STACK_UNWIND (fsetattr, frame, -1, op_errno, NULL, NULL, NULL);
        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
}

int32_t
client4_0_rchecksum (call_frame_t *frame, xlator_t *this,
                     void *data)
{
        clnt_args_t           *args      = NULL;
        int64_t                remote_fd = -1;
        clnt_conf_t           *conf      = NULL;
        gfx_rchecksum_req      req       = {{0},};
        int                    op_errno  = ESTALE;
        int                    ret       = 0;

        if (!frame || !this || !data)
                goto unwind;

        args = data;
        conf = this->private;

        CLIENT_GET_REMOTE_FD(this, args->fd, DEFAULT_REMOTE_FD,
                             remote_fd, op_errno, unwind);

        req.len    = args->len;
        req.offset = args->offset;
        req.fd     = remote_fd;
        memcpy (req.gfid, args->fd->inode->gfid, 16);

        dict_to_xdr (args->xdata, &req.xdata);

        ret = client_submit_request (this, &req, frame, conf->fops,
                                     GFS3_OP_RCHECKSUM,
                                     client4_rchecksum_cbk, NULL,
                                     NULL, 0, NULL,
                                     0, NULL,
                                     (xdrproc_t)xdr_gfx_rchecksum_req);
        if (ret) {
                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
                        "failed to send the fop");
        }

        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
unwind:
        CLIENT_STACK_UNWIND (rchecksum, frame, -1, op_errno, 0, NULL, NULL);
        GF_FREE (req.xdata.pairs.pairs_val);

        return 0;
}

int
client4_0_compound_cbk (struct rpc_req *req, struct iovec *iov, int count,
                        void *myframe)
{
        gfx_compound_rsp        rsp              = {0,};
        compound_args_cbk_t     *args_cbk        = NULL;
        call_frame_t            *frame           = NULL;
        xlator_t                *this            = NULL;
        dict_t                  *xdata           = NULL;
        clnt_local_t            *local           = NULL;
        int                     i                = 0;
        int                     length           = 0;
        int                     ret              = -1;

        this = THIS;

        frame = myframe;
        local = frame->local;

        if (-1 == req->rpc_status) {
                rsp.op_ret   = -1;
                rsp.op_errno = ENOTCONN;
                goto out;
        }

        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfx_compound_rsp);
        if (ret < 0) {
                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
                rsp.op_ret   = -1;
                rsp.op_errno = EINVAL;
                goto out;
        }

        length =  local->length;

        xdr_to_dict (&rsp.xdata, &xdata);

        args_cbk = compound_args_cbk_alloc (length, xdata);
        if (!args_cbk) {
                rsp.op_ret   = -1;
                rsp.op_errno = ENOMEM;
                goto out;
        }

        /* TODO: see https://bugzilla.redhat.com/show_bug.cgi?id=1376328 */
        for (i = 0; i < args_cbk->fop_length; i++) {
                ret = client_process_response_v2 (frame, this, req, &rsp,
                                                  args_cbk, i);
                if (ret) {
                        rsp.op_ret   = -1;
                        rsp.op_errno = -ret;
                        goto out;
                }

        }
        rsp.op_ret = 0;
out:
        if (rsp.op_ret == -1) {
                gf_msg (this->name, GF_LOG_WARNING,
                        gf_error_to_errno (rsp.op_errno),
                        PC_MSG_REMOTE_OP_FAILED,
                        "remote operation failed");
        }
        CLIENT_STACK_UNWIND (compound, frame, rsp.op_ret,
                             gf_error_to_errno (rsp.op_errno), args_cbk, xdata);

        client_compound_rsp_cleanup_v2 (&rsp, length);
        free (rsp.compound_rsp_array.compound_rsp_array_val);

        if (xdata)
                dict_unref (xdata);

        compound_args_cbk_cleanup (args_cbk);
        return 0;
}


/* Brief explanation of gfs3_compound_req structure :
 * 1) It consists of version of compounding.
 * 2) A compound-fop enum, new enum for compound fops
 * 3) A 'compound_req_arrray' structure that has
 *      a) array len - based on the number of fops compounded
 *      b) compound_req_array_val - pointer to an array of compound_req's
 * 4) compound_req - structure that contains:
 *      a) fop enum of type glusterfs_fop_t
 *      b) union of structures of xdr requests of all fops.
 */

int32_t
client4_0_compound (call_frame_t *frame, xlator_t *this, void *data)
{
        clnt_conf_t             *conf              = NULL;
        compound_args_t         *c_args            = data;
        gfx_compound_req         req                = {0,};
        clnt_local_t            *local             = NULL;
        int                     op_errno           = ENOMEM;
        int                     ret                = 0;
        int                     i                  = 0;
        int                     rsp_count          = 0;
        struct iovec            rsp_vector[MAX_IOVEC] = {{0}, };
        struct iovec            req_vector[MAX_IOVEC] = {{0}, };
        struct iovec            vector[MAX_IOVEC] = {{0}, };
        struct iovec            *rsphdr             = NULL;
        struct iobref           *req_iobref         = NULL;
        struct iobref           *rsp_iobref         = NULL;
        struct iobref           *rsphdr_iobref      = NULL;
        struct iobuf            *rsphdr_iobuf       = NULL;
        int                     rsphdr_count        = 0;
        int                     req_count           = 0;
        dict_t                  *xdata              = c_args->xdata;

        GF_ASSERT (frame);

        if (!this)
                goto unwind;

        memset (req_vector, 0, sizeof (req_vector));
        memset (rsp_vector, 0, sizeof (rsp_vector));

        conf = this->private;

        local = mem_get0 (this->local_pool);
        if (!local) {
                op_errno = ENOMEM;
                goto unwind;
        }
        frame->local = local;

        local->length = c_args->fop_length;
        local->compound_args = c_args;

        rsphdr_iobref = iobref_new ();
        if (rsphdr_iobref == NULL) {
                goto unwind;
        }

        /* TODO: what is the size we should send ? */
        rsphdr_iobuf = iobuf_get (this->ctx->iobuf_pool);
        if (rsphdr_iobuf == NULL) {
                goto unwind;
        }

        iobref_add (rsphdr_iobref, rsphdr_iobuf);
        iobuf_unref (rsphdr_iobuf);
        rsphdr = &vector[0];
        rsphdr->iov_base = iobuf_ptr (rsphdr_iobuf);
        rsphdr->iov_len = iobuf_pagesize (rsphdr_iobuf);
        rsphdr_count = 1;
        rsphdr_iobuf = NULL;

        req.compound_fop_enum = c_args->fop_enum;
        req.compound_req_array.compound_req_array_len = c_args->fop_length;
        req.compound_version = 0;
        dict_to_xdr (xdata, &req.xdata);

        req.compound_req_array.compound_req_array_val = GF_CALLOC (local->length,
                                                        sizeof (compound_req_v2),
                                                        gf_client_mt_compound_req_t);

        if (!req.compound_req_array.compound_req_array_val) {
                op_errno = ENOMEM;
                goto unwind;
        }

        for (i = 0; i < local->length; i++) {
                ret = client_handle_fop_requirements_v2 (this, frame,
                                                         &req, local,
                                                         &req_iobref, &rsp_iobref,
                                                         req_vector,
                                                         rsp_vector, &req_count,
                                                         &rsp_count,
                                                         &c_args->req_list[i],
                                                         c_args->enum_list[i],
                                                         i);
                if (ret) {
                        op_errno = ret;
                        goto unwind;
                }
        }

        local->iobref = rsp_iobref;
        rsp_iobref     = NULL;

        ret = client_submit_compound_request (this, &req, frame, conf->fops,
                                     GFS3_OP_COMPOUND, client4_0_compound_cbk,
                                     req_vector, req_count, req_iobref,
                                     rsphdr, rsphdr_count,
                                     rsp_vector, rsp_count,
                                     local->iobref,
                                     (xdrproc_t) xdr_gfx_compound_req);

        GF_FREE (req.xdata.pairs.pairs_val);

        iobref_unref (rsphdr_iobref);

        compound_request_cleanup_v2 (&req);
        return 0;
unwind:
        CLIENT_STACK_UNWIND (compound, frame, -1, op_errno, NULL, NULL);

        if (rsp_iobref)
                iobref_unref (rsp_iobref);

        if (rsphdr_iobref)
                iobref_unref (rsphdr_iobref);

        GF_FREE (req.xdata.pairs.pairs_val);

        compound_request_cleanup_v2 (&req);
        return 0;
}

/* Used From RPC-CLNT library to log proper name of procedure based on number */
char *clnt4_0_fop_names[GFS3_OP_MAXVALUE] = {
        [GFS3_OP_NULL]        = "NULL",
        [GFS3_OP_STAT]        = "STAT",
        [GFS3_OP_READLINK]    = "READLINK",
        [GFS3_OP_MKNOD]       = "MKNOD",
        [GFS3_OP_MKDIR]       = "MKDIR",
        [GFS3_OP_UNLINK]      = "UNLINK",
        [GFS3_OP_RMDIR]       = "RMDIR",
        [GFS3_OP_SYMLINK]     = "SYMLINK",
        [GFS3_OP_RENAME]      = "RENAME",
        [GFS3_OP_LINK]        = "LINK",
        [GFS3_OP_TRUNCATE]    = "TRUNCATE",
        [GFS3_OP_OPEN]        = "OPEN",
        [GFS3_OP_READ]        = "READ",
        [GFS3_OP_WRITE]       = "WRITE",
        [GFS3_OP_STATFS]      = "STATFS",
        [GFS3_OP_FLUSH]       = "FLUSH",
        [GFS3_OP_FSYNC]       = "FSYNC",
        [GFS3_OP_SETXATTR]    = "SETXATTR",
        [GFS3_OP_GETXATTR]    = "GETXATTR",
        [GFS3_OP_REMOVEXATTR] = "REMOVEXATTR",
        [GFS3_OP_OPENDIR]     = "OPENDIR",
        [GFS3_OP_FSYNCDIR]    = "FSYNCDIR",
        [GFS3_OP_ACCESS]      = "ACCESS",
        [GFS3_OP_CREATE]      = "CREATE",
        [GFS3_OP_FTRUNCATE]   = "FTRUNCATE",
        [GFS3_OP_FSTAT]       = "FSTAT",
        [GFS3_OP_LK]          = "LK",
        [GFS3_OP_LOOKUP]      = "LOOKUP",
        [GFS3_OP_READDIR]     = "READDIR",
        [GFS3_OP_INODELK]     = "INODELK",
        [GFS3_OP_FINODELK]    = "FINODELK",
        [GFS3_OP_ENTRYLK]     = "ENTRYLK",
        [GFS3_OP_FENTRYLK]    = "FENTRYLK",
        [GFS3_OP_XATTROP]     = "XATTROP",
        [GFS3_OP_FXATTROP]    = "FXATTROP",
        [GFS3_OP_FGETXATTR]   = "FGETXATTR",
        [GFS3_OP_FSETXATTR]   = "FSETXATTR",
        [GFS3_OP_RCHECKSUM]   = "RCHECKSUM",
        [GFS3_OP_SETATTR]     = "SETATTR",
        [GFS3_OP_FSETATTR]    = "FSETATTR",
        [GFS3_OP_READDIRP]    = "READDIRP",
        [GFS3_OP_RELEASE]     = "RELEASE",
        [GFS3_OP_RELEASEDIR]  = "RELEASEDIR",
        [GFS3_OP_FREMOVEXATTR] = "FREMOVEXATTR",
        [GFS3_OP_FALLOCATE]   = "FALLOCATE",
        [GFS3_OP_DISCARD]     = "DISCARD",
        [GFS3_OP_ZEROFILL]    = "ZEROFILL",
        [GFS3_OP_IPC]         = "IPC",
        [GFS3_OP_SEEK]        = "SEEK",
        [GFS3_OP_LEASE]       = "LEASE",
        [GFS3_OP_GETACTIVELK] = "GETACTIVELK",
        [GFS3_OP_SETACTIVELK] = "SETACTIVELK",
        [GFS3_OP_COMPOUND]    = "COMPOUND",
        [GFS3_OP_ICREATE]     = "ICREATE",
        [GFS3_OP_NAMELINK]    = "NAMELINK",
};

rpc_clnt_procedure_t clnt4_0_fop_actors[GF_FOP_MAXVALUE] = {
        [GF_FOP_NULL]        = { "NULL",        NULL},
        [GF_FOP_STAT]        = { "STAT",        client4_0_stat },
        [GF_FOP_READLINK]    = { "READLINK",    client4_0_readlink },
        [GF_FOP_MKNOD]       = { "MKNOD",       client4_0_mknod },
        [GF_FOP_MKDIR]       = { "MKDIR",       client4_0_mkdir },
        [GF_FOP_UNLINK]      = { "UNLINK",      client4_0_unlink },
        [GF_FOP_RMDIR]       = { "RMDIR",       client4_0_rmdir },
        [GF_FOP_SYMLINK]     = { "SYMLINK",     client4_0_symlink },
        [GF_FOP_RENAME]      = { "RENAME",      client4_0_rename },
        [GF_FOP_LINK]        = { "LINK",        client4_0_link },
        [GF_FOP_TRUNCATE]    = { "TRUNCATE",    client4_0_truncate },
        [GF_FOP_OPEN]        = { "OPEN",        client4_0_open },
        [GF_FOP_READ]        = { "READ",        client4_0_readv },
        [GF_FOP_WRITE]       = { "WRITE",       client4_0_writev },
        [GF_FOP_STATFS]      = { "STATFS",      client4_0_statfs },
        [GF_FOP_FLUSH]       = { "FLUSH",       client4_0_flush },
        [GF_FOP_FSYNC]       = { "FSYNC",       client4_0_fsync },
        [GF_FOP_GETXATTR]    = { "GETXATTR",    client4_0_getxattr },
        [GF_FOP_SETXATTR]    = { "SETXATTR",    client4_0_setxattr },
        [GF_FOP_REMOVEXATTR] = { "REMOVEXATTR", client4_0_removexattr },
        [GF_FOP_OPENDIR]     = { "OPENDIR",     client4_0_opendir },
        [GF_FOP_FSYNCDIR]    = { "FSYNCDIR",    client4_0_fsyncdir },
        [GF_FOP_ACCESS]      = { "ACCESS",      client4_0_access },
        [GF_FOP_CREATE]      = { "CREATE",      client4_0_create },
        [GF_FOP_FTRUNCATE]   = { "FTRUNCATE",   client4_0_ftruncate },
        [GF_FOP_FSTAT]       = { "FSTAT",       client4_0_fstat },
        [GF_FOP_LK]          = { "LK",          client4_0_lk },
        [GF_FOP_LOOKUP]      = { "LOOKUP",      client4_0_lookup },
        [GF_FOP_READDIR]     = { "READDIR",     client4_0_readdir },
        [GF_FOP_INODELK]     = { "INODELK",     client4_0_inodelk },
        [GF_FOP_FINODELK]    = { "FINODELK",    client4_0_finodelk },
        [GF_FOP_ENTRYLK]     = { "ENTRYLK",     client4_0_entrylk },
        [GF_FOP_FENTRYLK]    = { "FENTRYLK",    client4_0_fentrylk },
        [GF_FOP_XATTROP]     = { "XATTROP",     client4_0_xattrop },
        [GF_FOP_FXATTROP]    = { "FXATTROP",    client4_0_fxattrop },
        [GF_FOP_FGETXATTR]   = { "FGETXATTR",   client4_0_fgetxattr },
        [GF_FOP_FSETXATTR]   = { "FSETXATTR",   client4_0_fsetxattr },
        [GF_FOP_RCHECKSUM]   = { "RCHECKSUM",   client4_0_rchecksum },
        [GF_FOP_SETATTR]     = { "SETATTR",     client4_0_setattr },
        [GF_FOP_FSETATTR]    = { "FSETATTR",    client4_0_fsetattr },
        [GF_FOP_READDIRP]    = { "READDIRP",    client4_0_readdirp },
	[GF_FOP_FALLOCATE]   = { "FALLOCATE",	client4_0_fallocate },
	[GF_FOP_DISCARD]     = { "DISCARD",	client4_0_discard },
        [GF_FOP_ZEROFILL]     = { "ZEROFILL",     client4_0_zerofill},
        [GF_FOP_RELEASE]     = { "RELEASE",     client4_0_release },
        [GF_FOP_RELEASEDIR]  = { "RELEASEDIR",  client4_0_releasedir },
        [GF_FOP_GETSPEC]     = { "GETSPEC",     client3_getspec },
        [GF_FOP_FREMOVEXATTR] = { "FREMOVEXATTR", client4_0_fremovexattr },
        [GF_FOP_IPC]          = { "IPC",          client4_0_ipc },
        [GF_FOP_SEEK]         = { "SEEK",         client4_0_seek },
        [GF_FOP_LEASE]        = { "LEASE",        client4_0_lease },
        [GF_FOP_GETACTIVELK]  = { "GETACTIVELK", client4_0_getactivelk },
        [GF_FOP_SETACTIVELK]  = { "SETACTIVELK", client4_0_setactivelk },
        [GF_FOP_COMPOUND]     = { "COMPOUND",     client4_0_compound },
        [GF_FOP_ICREATE]      = { "ICREATE",      client4_0_icreate },
        [GF_FOP_NAMELINK]     = { "NAMELINK",     client4_0_namelink },
};


rpc_clnt_prog_t clnt4_0_fop_prog = {
        .progname  = "GlusterFS 4.x v1",
        .prognum   = GLUSTER_FOP_PROGRAM,
        .progver   = GLUSTER_FOP_VERSION_v2,
        .numproc   = GLUSTER_FOP_PROCCNT,
        .proctable = clnt4_0_fop_actors,
        .procnames = clnt4_0_fop_names,
};
